21502975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{607}}^1$

素因数の和:739

約数の個数: 24

約数和(自身を含む): 29025920

約数和(自身を除く): 7522945

約数列:

[1, 5, 13, 25, 65, 109, 325, 545, 607, 1417, 2725, 3035, 7085, 7891, 15175, 35425, 39455, 66163, 197275, 330815, 860119, 1654075, 4300595, 21502975]

約数ペア:

[(1, 21502975), (5, 4300595), (13, 1654075), (25, 860119), (65, 330815), (109, 197275), (325, 66163), (545, 39455), (607, 35425), (1417, 15175), (2725, 7891), (3035, 7085)]