21980255

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{47}}^1\times {\mathrm{773}}^1$

素因数の和:847

約数の個数: 24

約数和(自身を含む): 29647296

約数和(自身を除く): 7667041

約数列:

[1, 5, 11, 47, 55, 121, 235, 517, 605, 773, 2585, 3865, 5687, 8503, 28435, 36331, 42515, 93533, 181655, 399641, 467665, 1998205, 4396051, 21980255]

約数ペア:

[(1, 21980255), (5, 4396051), (11, 1998205), (47, 467665), (55, 399641), (121, 181655), (235, 93533), (517, 42515), (605, 36331), (773, 28435), (2585, 8503), (3865, 5687)]