21346820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{8821}}^1$

素因数の和:8852

約数の個数: 36

約数和(自身を含む): 49279692

約数和(自身を除く): 27932872

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 8821, 17642, 35284, 44105, 88210, 97031, 176420, 194062, 388124, 485155, 970310, 1067341, 1940620, 2134682, 4269364, 5336705, 10673410, 21346820]

約数ペア:

[(1, 21346820), (2, 10673410), (4, 5336705), (5, 4269364), (10, 2134682), (11, 1940620), (20, 1067341), (22, 970310), (44, 485155), (55, 388124), (110, 194062), (121, 176420), (220, 97031), (242, 88210), (484, 44105), (605, 35284), (1210, 17642), (2420, 8821)]