81099640

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{49451}}^1$

素因数の和:49503

約数の個数: 32

約数和(自身を含む): 186928560

約数和(自身を除く): 105828920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 49451, 98902, 197804, 247255, 395608, 494510, 989020, 1978040, 2027491, 4054982, 8109964, 10137455, 16219928, 20274910, 40549820, 81099640]

約数ペア:

[(1, 81099640), (2, 40549820), (4, 20274910), (5, 16219928), (8, 10137455), (10, 8109964), (20, 4054982), (40, 2027491), (41, 1978040), (82, 989020), (164, 494510), (205, 395608), (328, 247255), (410, 197804), (820, 98902), (1640, 49451)]