20471825

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{151}}^1$

素因数の和:218

約数の個数: 48

約数和(自身を含む): 30533760

約数和(自身を除く): 10061935

約数列:

[1, 5, 11, 17, 25, 29, 55, 85, 145, 151, 187, 275, 319, 425, 493, 725, 755, 935, 1595, 1661, 2465, 2567, 3775, 4379, 4675, 5423, 7975, 8305, 12325, 12835, 21895, 27115, 28237, 41525, 48169, 64175, 74443, 109475, 135575, 141185, 240845, 372215, 705925, 818873, 1204225, 1861075, 4094365, 20471825]

約数ペア:

[(1, 20471825), (5, 4094365), (11, 1861075), (17, 1204225), (25, 818873), (29, 705925), (55, 372215), (85, 240845), (145, 141185), (151, 135575), (187, 109475), (275, 74443), (319, 64175), (425, 48169), (493, 41525), (725, 28237), (755, 27115), (935, 21895), (1595, 12835), (1661, 12325), (2465, 8305), (2567, 7975), (3775, 5423), (4379, 4675)]