81604540

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{94889}}^1$

素因数の和:94941

約数の個数: 24

約数和(自身を含む): 175356720

約数和(自身を除く): 93752180

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 94889, 189778, 379556, 474445, 948890, 1897780, 4080227, 8160454, 16320908, 20401135, 40802270, 81604540]

約数ペア:

[(1, 81604540), (2, 40802270), (4, 20401135), (5, 16320908), (10, 8160454), (20, 4080227), (43, 1897780), (86, 948890), (172, 474445), (215, 379556), (430, 189778), (860, 94889)]