20105020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{1459}}^1$

素因数の和:1534

約数の個数: 48

約数和(自身を含む): 46357920

約数和(自身を除く): 26252900

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 53, 65, 106, 130, 212, 260, 265, 530, 689, 1060, 1378, 1459, 2756, 2918, 3445, 5836, 6890, 7295, 13780, 14590, 18967, 29180, 37934, 75868, 77327, 94835, 154654, 189670, 309308, 379340, 386635, 773270, 1005251, 1546540, 2010502, 4021004, 5026255, 10052510, 20105020]

約数ペア:

[(1, 20105020), (2, 10052510), (4, 5026255), (5, 4021004), (10, 2010502), (13, 1546540), (20, 1005251), (26, 773270), (52, 386635), (53, 379340), (65, 309308), (106, 189670), (130, 154654), (212, 94835), (260, 77327), (265, 75868), (530, 37934), (689, 29180), (1060, 18967), (1378, 14590), (1459, 13780), (2756, 7295), (2918, 6890), (3445, 5836)]