21981080

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49957}}^1$

素因数の和:49979

約数の個数: 32

約数和(自身を含む): 53954640

約数和(自身を除く): 31973560

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49957, 99914, 199828, 249785, 399656, 499570, 549527, 999140, 1099054, 1998280, 2198108, 2747635, 4396216, 5495270, 10990540, 21981080]

約数ペア:

[(1, 21981080), (2, 10990540), (4, 5495270), (5, 4396216), (8, 2747635), (10, 2198108), (11, 1998280), (20, 1099054), (22, 999140), (40, 549527), (44, 499570), (55, 399656), (88, 249785), (110, 199828), (220, 99914), (440, 49957)]