21615680

素因数分解:

$2^6\times 5^1\times {\mathrm{31}}^1\times {\mathrm{2179}}^1$

素因数の和:2227

約数の個数: 56

約数和(自身を含む): 53157120

約数和(自身を除く): 31541440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 155, 160, 248, 310, 320, 496, 620, 992, 1240, 1984, 2179, 2480, 4358, 4960, 8716, 9920, 10895, 17432, 21790, 34864, 43580, 67549, 69728, 87160, 135098, 139456, 174320, 270196, 337745, 348640, 540392, 675490, 697280, 1080784, 1350980, 2161568, 2701960, 4323136, 5403920, 10807840, 21615680]

約数ペア:

[(1, 21615680), (2, 10807840), (4, 5403920), (5, 4323136), (8, 2701960), (10, 2161568), (16, 1350980), (20, 1080784), (31, 697280), (32, 675490), (40, 540392), (62, 348640), (64, 337745), (80, 270196), (124, 174320), (155, 139456), (160, 135098), (248, 87160), (310, 69728), (320, 67549), (496, 43580), (620, 34864), (992, 21790), (1240, 17432), (1984, 10895), (2179, 9920), (2480, 8716), (4358, 4960)]