20886728

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{197}}^1\times {\mathrm{457}}^1$

素因数の和:689

約数の個数: 32

約数和(自身を含む): 40807800

約数和(自身を除く): 19921072

約数列:

[1, 2, 4, 8, 29, 58, 116, 197, 232, 394, 457, 788, 914, 1576, 1828, 3656, 5713, 11426, 13253, 22852, 26506, 45704, 53012, 90029, 106024, 180058, 360116, 720232, 2610841, 5221682, 10443364, 20886728]

約数ペア:

[(1, 20886728), (2, 10443364), (4, 5221682), (8, 2610841), (29, 720232), (58, 360116), (116, 180058), (197, 106024), (232, 90029), (394, 53012), (457, 45704), (788, 26506), (914, 22852), (1576, 13253), (1828, 11426), (3656, 5713)]