21791325

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{233}}^1$

素因数の和:318

約数の個数: 48

約数和(自身を含む): 38301120

約数和(自身を除く): 16509795

約数列:

[1, 3, 5, 15, 25, 29, 43, 75, 87, 129, 145, 215, 233, 435, 645, 699, 725, 1075, 1165, 1247, 2175, 3225, 3495, 3741, 5825, 6235, 6757, 10019, 17475, 18705, 20271, 30057, 31175, 33785, 50095, 93525, 101355, 150285, 168925, 250475, 290551, 506775, 751425, 871653, 1452755, 4358265, 7263775, 21791325]

約数ペア:

[(1, 21791325), (3, 7263775), (5, 4358265), (15, 1452755), (25, 871653), (29, 751425), (43, 506775), (75, 290551), (87, 250475), (129, 168925), (145, 150285), (215, 101355), (233, 93525), (435, 50095), (645, 33785), (699, 31175), (725, 30057), (1075, 20271), (1165, 18705), (1247, 17475), (2175, 10019), (3225, 6757), (3495, 6235), (3741, 5825)]