21225825

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3253}}^1$

素因数の和:3298

約数の個数: 36

約数和(自身を含む): 39340860

約数和(自身を除く): 18115035

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3253, 6525, 9759, 16265, 29277, 48795, 81325, 94337, 146385, 243975, 283011, 471685, 731925, 849033, 1415055, 2358425, 4245165, 7075275, 21225825]

約数ペア:

[(1, 21225825), (3, 7075275), (5, 4245165), (9, 2358425), (15, 1415055), (25, 849033), (29, 731925), (45, 471685), (75, 283011), (87, 243975), (145, 146385), (225, 94337), (261, 81325), (435, 48795), (725, 29277), (1305, 16265), (2175, 9759), (3253, 6525)]