21357075

素因数分解:

$3^1\times 5^2\times {\mathrm{163}}^1\times {\mathrm{1747}}^1$

素因数の和:1923

約数の個数: 24

約数和(自身を含む): 35547328

約数和(自身を除く): 14190253

約数列:

[1, 3, 5, 15, 25, 75, 163, 489, 815, 1747, 2445, 4075, 5241, 8735, 12225, 26205, 43675, 131025, 284761, 854283, 1423805, 4271415, 7119025, 21357075]

約数ペア:

[(1, 21357075), (3, 7119025), (5, 4271415), (15, 1423805), (25, 854283), (75, 284761), (163, 131025), (489, 43675), (815, 26205), (1747, 12225), (2445, 8735), (4075, 5241)]