28908880

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^2$

素因数の和:82

約数の個数: 240

約数和(自身を含む): 95243904

約数和(自身を除く): 66335024

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 19, 20, 22, 26, 28, 35, 38, 40, 44, 52, 55, 56, 65, 70, 76, 77, 80, 88, 91, 95, 104, 110, 112, 130, 133, 140, 143, 152, 154, 176, 182, 190, 208, 209, 220, 247, 260, 266, 280, 286, 304, 308, 361, 364, 380, 385, 418, 440, 455, 494, 520, 532, 560, 572, 616, 665, 715, 722, 728, 760, 770, 836, 880, 910, 988, 1001, 1040, 1045, 1064, 1144, 1232, 1235, 1330, 1430, 1444, 1456, 1463, 1520, 1540, 1672, 1729, 1805, 1820, 1976, 2002, 2090, 2128, 2288, 2470, 2527, 2660, 2717, 2860, 2888, 2926, 3080, 3344, 3458, 3610, 3640, 3952, 3971, 4004, 4180, 4693, 4940, 5005, 5054, 5320, 5434, 5720, 5776, 5852, 6160, 6916, 7220, 7280, 7315, 7942, 8008, 8360, 8645, 9386, 9880, 10010, 10108, 10640, 10868, 11440, 11704, 12635, 13585, 13832, 14440, 14630, 15884, 16016, 16720, 17290, 18772, 19019, 19760, 19855, 20020, 20216, 21736, 23408, 23465, 25270, 27170, 27664, 27797, 28880, 29260, 31768, 32851, 34580, 37544, 38038, 39710, 40040, 40432, 43472, 46930, 50540, 51623, 54340, 55594, 58520, 63536, 65702, 69160, 75088, 76076, 79420, 80080, 93860, 95095, 101080, 103246, 108680, 111188, 117040, 131404, 138320, 138985, 152152, 158840, 164255, 187720, 190190, 202160, 206492, 217360, 222376, 258115, 262808, 277970, 304304, 317680, 328510, 361361, 375440, 380380, 412984, 444752, 516230, 525616, 555940, 657020, 722722, 760760, 825968, 1032460, 1111880, 1314040, 1445444, 1521520, 1806805, 2064920, 2223760, 2628080, 2890888, 3613610, 4129840, 5781776, 7227220, 14454440, 28908880]

約数ペア:

[(1, 28908880), (2, 14454440), (4, 7227220), (5, 5781776), (7, 4129840), (8, 3613610), (10, 2890888), (11, 2628080), (13, 2223760), (14, 2064920), (16, 1806805), (19, 1521520), (20, 1445444), (22, 1314040), (26, 1111880), (28, 1032460), (35, 825968), (38, 760760), (40, 722722), (44, 657020), (52, 555940), (55, 525616), (56, 516230), (65, 444752), (70, 412984), (76, 380380), (77, 375440), (80, 361361), (88, 328510), (91, 317680), (95, 304304), (104, 277970), (110, 262808), (112, 258115), (130, 222376), (133, 217360), (140, 206492), (143, 202160), (152, 190190), (154, 187720), (176, 164255), (182, 158840), (190, 152152), (208, 138985), (209, 138320), (220, 131404), (247, 117040), (260, 111188), (266, 108680), (280, 103246), (286, 101080), (304, 95095), (308, 93860), (361, 80080), (364, 79420), (380, 76076), (385, 75088), (418, 69160), (440, 65702), (455, 63536), (494, 58520), (520, 55594), (532, 54340), (560, 51623), (572, 50540), (616, 46930), (665, 43472), (715, 40432), (722, 40040), (728, 39710), (760, 38038), (770, 37544), (836, 34580), (880, 32851), (910, 31768), (988, 29260), (1001, 28880), (1040, 27797), (1045, 27664), (1064, 27170), (1144, 25270), (1232, 23465), (1235, 23408), (1330, 21736), (1430, 20216), (1444, 20020), (1456, 19855), (1463, 19760), (1520, 19019), (1540, 18772), (1672, 17290), (1729, 16720), (1805, 16016), (1820, 15884), (1976, 14630), (2002, 14440), (2090, 13832), (2128, 13585), (2288, 12635), (2470, 11704), (2527, 11440), (2660, 10868), (2717, 10640), (2860, 10108), (2888, 10010), (2926, 9880), (3080, 9386), (3344, 8645), (3458, 8360), (3610, 8008), (3640, 7942), (3952, 7315), (3971, 7280), (4004, 7220), (4180, 6916), (4693, 6160), (4940, 5852), (5005, 5776), (5054, 5720), (5320, 5434)]