31251220

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1$

素因数の和:270

約数の個数: 144

約数和(自身を含む): 90091008

約数和(自身を除く): 58839788

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 49, 52, 55, 65, 70, 77, 91, 98, 110, 130, 140, 143, 154, 182, 196, 220, 223, 245, 260, 286, 308, 364, 385, 446, 455, 490, 539, 572, 637, 715, 770, 892, 910, 980, 1001, 1078, 1115, 1274, 1430, 1540, 1561, 1820, 2002, 2156, 2230, 2453, 2548, 2695, 2860, 2899, 3122, 3185, 4004, 4460, 4906, 5005, 5390, 5798, 6244, 6370, 7007, 7805, 9812, 10010, 10780, 10927, 11596, 12265, 12740, 14014, 14495, 15610, 17171, 20020, 20293, 21854, 24530, 28028, 28990, 31220, 31889, 34342, 35035, 40586, 43708, 49060, 54635, 57980, 63778, 68684, 70070, 81172, 85855, 101465, 109270, 120197, 127556, 140140, 142051, 159445, 171710, 202930, 218540, 223223, 240394, 284102, 318890, 343420, 405860, 446446, 480788, 568204, 600985, 637780, 710255, 892892, 1116115, 1201970, 1420510, 1562561, 2232230, 2403940, 2841020, 3125122, 4464460, 6250244, 7812805, 15625610, 31251220]

約数ペア:

[(1, 31251220), (2, 15625610), (4, 7812805), (5, 6250244), (7, 4464460), (10, 3125122), (11, 2841020), (13, 2403940), (14, 2232230), (20, 1562561), (22, 1420510), (26, 1201970), (28, 1116115), (35, 892892), (44, 710255), (49, 637780), (52, 600985), (55, 568204), (65, 480788), (70, 446446), (77, 405860), (91, 343420), (98, 318890), (110, 284102), (130, 240394), (140, 223223), (143, 218540), (154, 202930), (182, 171710), (196, 159445), (220, 142051), (223, 140140), (245, 127556), (260, 120197), (286, 109270), (308, 101465), (364, 85855), (385, 81172), (446, 70070), (455, 68684), (490, 63778), (539, 57980), (572, 54635), (637, 49060), (715, 43708), (770, 40586), (892, 35035), (910, 34342), (980, 31889), (1001, 31220), (1078, 28990), (1115, 28028), (1274, 24530), (1430, 21854), (1540, 20293), (1561, 20020), (1820, 17171), (2002, 15610), (2156, 14495), (2230, 14014), (2453, 12740), (2548, 12265), (2695, 11596), (2860, 10927), (2899, 10780), (3122, 10010), (3185, 9812), (4004, 7805), (4460, 7007), (4906, 6370), (5005, 6244), (5390, 5798)]