256619640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{157}}^1\times {\mathrm{257}}^1$

素因数の和:481

約数の個数: 128

約数和(自身を含む): 792452160

約数和(自身を除く): 535832520

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 53, 60, 106, 120, 157, 159, 212, 257, 265, 314, 318, 424, 471, 514, 530, 628, 636, 771, 785, 795, 942, 1028, 1060, 1256, 1272, 1285, 1542, 1570, 1590, 1884, 2056, 2120, 2355, 2570, 3084, 3140, 3180, 3768, 3855, 4710, 5140, 6168, 6280, 6360, 7710, 8321, 9420, 10280, 13621, 15420, 16642, 18840, 24963, 27242, 30840, 33284, 40349, 40863, 41605, 49926, 54484, 66568, 68105, 80698, 81726, 83210, 99852, 108968, 121047, 124815, 136210, 161396, 163452, 166420, 199704, 201745, 204315, 242094, 249630, 272420, 322792, 326904, 332840, 403490, 408630, 484188, 499260, 544840, 605235, 806980, 817260, 968376, 998520, 1210470, 1613960, 1634520, 2138497, 2420940, 4276994, 4841880, 6415491, 8553988, 10692485, 12830982, 17107976, 21384970, 25661964, 32077455, 42769940, 51323928, 64154910, 85539880, 128309820, 256619640]

約数ペア:

[(1, 256619640), (2, 128309820), (3, 85539880), (4, 64154910), (5, 51323928), (6, 42769940), (8, 32077455), (10, 25661964), (12, 21384970), (15, 17107976), (20, 12830982), (24, 10692485), (30, 8553988), (40, 6415491), (53, 4841880), (60, 4276994), (106, 2420940), (120, 2138497), (157, 1634520), (159, 1613960), (212, 1210470), (257, 998520), (265, 968376), (314, 817260), (318, 806980), (424, 605235), (471, 544840), (514, 499260), (530, 484188), (628, 408630), (636, 403490), (771, 332840), (785, 326904), (795, 322792), (942, 272420), (1028, 249630), (1060, 242094), (1256, 204315), (1272, 201745), (1285, 199704), (1542, 166420), (1570, 163452), (1590, 161396), (1884, 136210), (2056, 124815), (2120, 121047), (2355, 108968), (2570, 99852), (3084, 83210), (3140, 81726), (3180, 80698), (3768, 68105), (3855, 66568), (4710, 54484), (5140, 49926), (6168, 41605), (6280, 40863), (6360, 40349), (7710, 33284), (8321, 30840), (9420, 27242), (10280, 24963), (13621, 18840), (15420, 16642)]