21457645

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^2\times {\mathrm{211}}^1$

素因数の和:313

約数の個数: 24

約数和(自身を含む): 28894752

約数和(自身を除く): 7437107

約数列:

[1, 5, 11, 43, 55, 211, 215, 473, 1055, 1849, 2321, 2365, 9073, 9245, 11605, 20339, 45365, 99803, 101695, 390139, 499015, 1950695, 4291529, 21457645]

約数ペア:

[(1, 21457645), (5, 4291529), (11, 1950695), (43, 499015), (55, 390139), (211, 101695), (215, 99803), (473, 45365), (1055, 20339), (1849, 11605), (2321, 9245), (2365, 9073)]