20989936

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{499}}^1$

素因数の和:757

約数の個数: 40

約数和(自身を含む): 44640000

約数和(自身を除く): 23650064

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 239, 478, 499, 956, 998, 1912, 1996, 2629, 3824, 3992, 5258, 5489, 7984, 10516, 10978, 21032, 21956, 42064, 43912, 87824, 119261, 238522, 477044, 954088, 1311871, 1908176, 2623742, 5247484, 10494968, 20989936]

約数ペア:

[(1, 20989936), (2, 10494968), (4, 5247484), (8, 2623742), (11, 1908176), (16, 1311871), (22, 954088), (44, 477044), (88, 238522), (176, 119261), (239, 87824), (478, 43912), (499, 42064), (956, 21956), (998, 21032), (1912, 10978), (1996, 10516), (2629, 7984), (3824, 5489), (3992, 5258)]