64555640

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{659}}^1$

素因数の和:780

約数の個数: 64

約数和(自身を含む): 152064000

約数和(自身を除く): 87508360

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 79, 124, 155, 158, 248, 310, 316, 395, 620, 632, 659, 790, 1240, 1318, 1580, 2449, 2636, 3160, 3295, 4898, 5272, 6590, 9796, 12245, 13180, 19592, 20429, 24490, 26360, 40858, 48980, 52061, 81716, 97960, 102145, 104122, 163432, 204290, 208244, 260305, 408580, 416488, 520610, 817160, 1041220, 1613891, 2082440, 3227782, 6455564, 8069455, 12911128, 16138910, 32277820, 64555640]

約数ペア:

[(1, 64555640), (2, 32277820), (4, 16138910), (5, 12911128), (8, 8069455), (10, 6455564), (20, 3227782), (31, 2082440), (40, 1613891), (62, 1041220), (79, 817160), (124, 520610), (155, 416488), (158, 408580), (248, 260305), (310, 208244), (316, 204290), (395, 163432), (620, 104122), (632, 102145), (659, 97960), (790, 81716), (1240, 52061), (1318, 48980), (1580, 40858), (2449, 26360), (2636, 24490), (3160, 20429), (3295, 19592), (4898, 13180), (5272, 12245), (6590, 9796)]