20904280

素因数分解:

$2^3\times 5^1\times {\mathrm{73}}^1\times {\mathrm{7159}}^1$

素因数の和:7243

約数の個数: 32

約数和(自身を含む): 47685600

約数和(自身を除く): 26781320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 73, 146, 292, 365, 584, 730, 1460, 2920, 7159, 14318, 28636, 35795, 57272, 71590, 143180, 286360, 522607, 1045214, 2090428, 2613035, 4180856, 5226070, 10452140, 20904280]

約数ペア:

[(1, 20904280), (2, 10452140), (4, 5226070), (5, 4180856), (8, 2613035), (10, 2090428), (20, 1045214), (40, 522607), (73, 286360), (146, 143180), (292, 71590), (365, 57272), (584, 35795), (730, 28636), (1460, 14318), (2920, 7159)]