18155780

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{11491}}^1$

素因数の和:11579

約数の個数: 24

約数和(自身を含む): 38613120

約数和(自身を除く): 20457340

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 11491, 22982, 45964, 57455, 114910, 229820, 907789, 1815578, 3631156, 4538945, 9077890, 18155780]

約数ペア:

[(1, 18155780), (2, 9077890), (4, 4538945), (5, 3631156), (10, 1815578), (20, 907789), (79, 229820), (158, 114910), (316, 57455), (395, 45964), (790, 22982), (1580, 11491)]