21537725

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^2\times {\mathrm{271}}^1$

素因数の和:326

約数の個数: 36

約数和(自身を含む): 31063488

約数和(自身を除く): 9525763

約数列:

[1, 5, 11, 17, 25, 55, 85, 187, 271, 275, 289, 425, 935, 1355, 1445, 2981, 3179, 4607, 4675, 6775, 7225, 14905, 15895, 23035, 50677, 74525, 78319, 79475, 115175, 253385, 391595, 861509, 1266925, 1957975, 4307545, 21537725]

約数ペア:

[(1, 21537725), (5, 4307545), (11, 1957975), (17, 1266925), (25, 861509), (55, 391595), (85, 253385), (187, 115175), (271, 79475), (275, 78319), (289, 74525), (425, 50677), (935, 23035), (1355, 15895), (1445, 14905), (2981, 7225), (3179, 6775), (4607, 4675)]