20387760

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{263}}^1$

素因数の和:315

約数の個数: 160

約数和(自身を含む): 70709760

約数和(自身を除く): 50322000

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 17, 19, 20, 24, 30, 34, 38, 40, 48, 51, 57, 60, 68, 76, 80, 85, 95, 102, 114, 120, 136, 152, 170, 190, 204, 228, 240, 255, 263, 272, 285, 304, 323, 340, 380, 408, 456, 510, 526, 570, 646, 680, 760, 789, 816, 912, 969, 1020, 1052, 1140, 1292, 1315, 1360, 1520, 1578, 1615, 1938, 2040, 2104, 2280, 2584, 2630, 3156, 3230, 3876, 3945, 4080, 4208, 4471, 4560, 4845, 4997, 5168, 5260, 6312, 6460, 7752, 7890, 8942, 9690, 9994, 10520, 12624, 12920, 13413, 14991, 15504, 15780, 17884, 19380, 19988, 21040, 22355, 24985, 25840, 26826, 29982, 31560, 35768, 38760, 39976, 44710, 49970, 53652, 59964, 63120, 67065, 71536, 74955, 77520, 79952, 84949, 89420, 99940, 107304, 119928, 134130, 149910, 169898, 178840, 199880, 214608, 239856, 254847, 268260, 299820, 339796, 357680, 399760, 424745, 509694, 536520, 599640, 679592, 849490, 1019388, 1073040, 1199280, 1274235, 1359184, 1698980, 2038776, 2548470, 3397960, 4077552, 5096940, 6795920, 10193880, 20387760]

約数ペア:

[(1, 20387760), (2, 10193880), (3, 6795920), (4, 5096940), (5, 4077552), (6, 3397960), (8, 2548470), (10, 2038776), (12, 1698980), (15, 1359184), (16, 1274235), (17, 1199280), (19, 1073040), (20, 1019388), (24, 849490), (30, 679592), (34, 599640), (38, 536520), (40, 509694), (48, 424745), (51, 399760), (57, 357680), (60, 339796), (68, 299820), (76, 268260), (80, 254847), (85, 239856), (95, 214608), (102, 199880), (114, 178840), (120, 169898), (136, 149910), (152, 134130), (170, 119928), (190, 107304), (204, 99940), (228, 89420), (240, 84949), (255, 79952), (263, 77520), (272, 74955), (285, 71536), (304, 67065), (323, 63120), (340, 59964), (380, 53652), (408, 49970), (456, 44710), (510, 39976), (526, 38760), (570, 35768), (646, 31560), (680, 29982), (760, 26826), (789, 25840), (816, 24985), (912, 22355), (969, 21040), (1020, 19988), (1052, 19380), (1140, 17884), (1292, 15780), (1315, 15504), (1360, 14991), (1520, 13413), (1578, 12920), (1615, 12624), (1938, 10520), (2040, 9994), (2104, 9690), (2280, 8942), (2584, 7890), (2630, 7752), (3156, 6460), (3230, 6312), (3876, 5260), (3945, 5168), (4080, 4997), (4208, 4845), (4471, 4560)]