81019640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{4211}}^1$

素因数の和:4272

約数の個数: 64

約数和(自身を含む): 201670560

約数和(自身を除く): 120650920

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 37, 40, 52, 65, 74, 104, 130, 148, 185, 260, 296, 370, 481, 520, 740, 962, 1480, 1924, 2405, 3848, 4211, 4810, 8422, 9620, 16844, 19240, 21055, 33688, 42110, 54743, 84220, 109486, 155807, 168440, 218972, 273715, 311614, 437944, 547430, 623228, 779035, 1094860, 1246456, 1558070, 2025491, 2189720, 3116140, 4050982, 6232280, 8101964, 10127455, 16203928, 20254910, 40509820, 81019640]

約数ペア:

[(1, 81019640), (2, 40509820), (4, 20254910), (5, 16203928), (8, 10127455), (10, 8101964), (13, 6232280), (20, 4050982), (26, 3116140), (37, 2189720), (40, 2025491), (52, 1558070), (65, 1246456), (74, 1094860), (104, 779035), (130, 623228), (148, 547430), (185, 437944), (260, 311614), (296, 273715), (370, 218972), (481, 168440), (520, 155807), (740, 109486), (962, 84220), (1480, 54743), (1924, 42110), (2405, 33688), (3848, 21055), (4211, 19240), (4810, 16844), (8422, 9620)]