81324920

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{27851}}^1$

素因数の和:27935

約数の個数: 32

約数和(自身を含む): 185494320

約数和(自身を除く): 104169400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 27851, 55702, 111404, 139255, 222808, 278510, 557020, 1114040, 2033123, 4066246, 8132492, 10165615, 16264984, 20331230, 40662460, 81324920]

約数ペア:

[(1, 81324920), (2, 40662460), (4, 20331230), (5, 16264984), (8, 10165615), (10, 8132492), (20, 4066246), (40, 2033123), (73, 1114040), (146, 557020), (292, 278510), (365, 222808), (584, 139255), (730, 111404), (1460, 55702), (2920, 27851)]