640613584

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{10657}}^1$

素因数の和:10712

約数の個数: 60

約数和(自身を含む): 1420050604

約数和(自身を除く): 779437020

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 52, 68, 104, 136, 208, 221, 272, 289, 442, 578, 884, 1156, 1768, 2312, 3536, 3757, 4624, 7514, 10657, 15028, 21314, 30056, 42628, 60112, 85256, 138541, 170512, 181169, 277082, 362338, 554164, 724676, 1108328, 1449352, 2216656, 2355197, 2898704, 3079873, 4710394, 6159746, 9420788, 12319492, 18841576, 24638984, 37683152, 40038349, 49277968, 80076698, 160153396, 320306792, 640613584]

約数ペア:

[(1, 640613584), (2, 320306792), (4, 160153396), (8, 80076698), (13, 49277968), (16, 40038349), (17, 37683152), (26, 24638984), (34, 18841576), (52, 12319492), (68, 9420788), (104, 6159746), (136, 4710394), (208, 3079873), (221, 2898704), (272, 2355197), (289, 2216656), (442, 1449352), (578, 1108328), (884, 724676), (1156, 554164), (1768, 362338), (2312, 277082), (3536, 181169), (3757, 170512), (4624, 138541), (7514, 85256), (10657, 60112), (15028, 42628), (21314, 30056)]