21310120

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{383}}^1$

素因数の和:514

約数の個数: 64

約数和(自身を含む): 52254720

約数和(自身を除く): 30944600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 107, 130, 214, 260, 383, 428, 520, 535, 766, 856, 1070, 1391, 1532, 1915, 2140, 2782, 3064, 3830, 4280, 4979, 5564, 6955, 7660, 9958, 11128, 13910, 15320, 19916, 24895, 27820, 39832, 40981, 49790, 55640, 81962, 99580, 163924, 199160, 204905, 327848, 409810, 532753, 819620, 1065506, 1639240, 2131012, 2663765, 4262024, 5327530, 10655060, 21310120]

約数ペア:

[(1, 21310120), (2, 10655060), (4, 5327530), (5, 4262024), (8, 2663765), (10, 2131012), (13, 1639240), (20, 1065506), (26, 819620), (40, 532753), (52, 409810), (65, 327848), (104, 204905), (107, 199160), (130, 163924), (214, 99580), (260, 81962), (383, 55640), (428, 49790), (520, 40981), (535, 39832), (766, 27820), (856, 24895), (1070, 19916), (1391, 15320), (1532, 13910), (1915, 11128), (2140, 9958), (2782, 7660), (3064, 6955), (3830, 5564), (4280, 4979)]