217620980

素因数分解:

$2^2\times 5^1\times {\mathrm{1451}}^1\times {\mathrm{7499}}^1$

素因数の和:8959

約数の個数: 24

約数和(自身を含む): 457380000

約数和(自身を除く): 239759020

約数列:

[1, 2, 4, 5, 10, 20, 1451, 2902, 5804, 7255, 7499, 14510, 14998, 29020, 29996, 37495, 74990, 149980, 10881049, 21762098, 43524196, 54405245, 108810490, 217620980]

約数ペア:

[(1, 217620980), (2, 108810490), (4, 54405245), (5, 43524196), (10, 21762098), (20, 10881049), (1451, 149980), (2902, 74990), (5804, 37495), (7255, 29996), (7499, 29020), (14510, 14998)]