31505890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1$

素因数の和:247

約数の個数: 64

約数和(自身を含む): 64683360

約数和(自身を除く): 33177470

約数列:

[1, 2, 5, 10, 13, 26, 29, 58, 61, 65, 122, 130, 137, 145, 274, 290, 305, 377, 610, 685, 754, 793, 1370, 1586, 1769, 1781, 1885, 3538, 3562, 3770, 3965, 3973, 7930, 7946, 8357, 8845, 8905, 16714, 17690, 17810, 19865, 22997, 39730, 41785, 45994, 51649, 83570, 103298, 108641, 114985, 217282, 229970, 242353, 258245, 484706, 516490, 543205, 1086410, 1211765, 2423530, 3150589, 6301178, 15752945, 31505890]

約数ペア:

[(1, 31505890), (2, 15752945), (5, 6301178), (10, 3150589), (13, 2423530), (26, 1211765), (29, 1086410), (58, 543205), (61, 516490), (65, 484706), (122, 258245), (130, 242353), (137, 229970), (145, 217282), (274, 114985), (290, 108641), (305, 103298), (377, 83570), (610, 51649), (685, 45994), (754, 41785), (793, 39730), (1370, 22997), (1586, 19865), (1769, 17810), (1781, 17690), (1885, 16714), (3538, 8905), (3562, 8845), (3770, 8357), (3965, 7946), (3973, 7930)]