21893905

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12841}}^1$

素因数の和:12888

約数の個数: 16

約数和(自身を含む): 29587968

約数和(自身を除く): 7694063

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12841, 64205, 141251, 398071, 706255, 1990355, 4378781, 21893905]

約数ペア:

[(1, 21893905), (5, 4378781), (11, 1990355), (31, 706255), (55, 398071), (155, 141251), (341, 64205), (1705, 12841)]