21033020

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{661}}^1$

素因数の和:750

約数の個数: 48

約数和(自身を含む): 46488288

約数和(自身を除く): 25455268

約数列:

[1, 2, 4, 5, 10, 20, 37, 43, 74, 86, 148, 172, 185, 215, 370, 430, 661, 740, 860, 1322, 1591, 2644, 3182, 3305, 6364, 6610, 7955, 13220, 15910, 24457, 28423, 31820, 48914, 56846, 97828, 113692, 122285, 142115, 244570, 284230, 489140, 568460, 1051651, 2103302, 4206604, 5258255, 10516510, 21033020]

約数ペア:

[(1, 21033020), (2, 10516510), (4, 5258255), (5, 4206604), (10, 2103302), (20, 1051651), (37, 568460), (43, 489140), (74, 284230), (86, 244570), (148, 142115), (172, 122285), (185, 113692), (215, 97828), (370, 56846), (430, 48914), (661, 31820), (740, 28423), (860, 24457), (1322, 15910), (1591, 13220), (2644, 7955), (3182, 6610), (3305, 6364)]