180718640

素因数分解:

$2^4\times 5^1\times {\mathrm{113}}^1\times {\mathrm{19991}}^1$

素因数の和:20117

約数の個数: 40

約数和(自身を含む): 423910368

約数和(自身を除く): 243191728

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 113, 226, 452, 565, 904, 1130, 1808, 2260, 4520, 9040, 19991, 39982, 79964, 99955, 159928, 199910, 319856, 399820, 799640, 1599280, 2258983, 4517966, 9035932, 11294915, 18071864, 22589830, 36143728, 45179660, 90359320, 180718640]

約数ペア:

[(1, 180718640), (2, 90359320), (4, 45179660), (5, 36143728), (8, 22589830), (10, 18071864), (16, 11294915), (20, 9035932), (40, 4517966), (80, 2258983), (113, 1599280), (226, 799640), (452, 399820), (565, 319856), (904, 199910), (1130, 159928), (1808, 99955), (2260, 79964), (4520, 39982), (9040, 19991)]