21354875

素因数分解:

$5^3\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1$

素因数の和:224

約数の個数: 32

約数和(自身を含む): 28416960

約数和(自身を除く): 7062085

約数列:

[1, 5, 25, 29, 43, 125, 137, 145, 215, 685, 725, 1075, 1247, 3425, 3625, 3973, 5375, 5891, 6235, 17125, 19865, 29455, 31175, 99325, 147275, 155875, 170839, 496625, 736375, 854195, 4270975, 21354875]

約数ペア:

[(1, 21354875), (5, 4270975), (25, 854195), (29, 736375), (43, 496625), (125, 170839), (137, 155875), (145, 147275), (215, 99325), (685, 31175), (725, 29455), (1075, 19865), (1247, 17125), (3425, 6235), (3625, 5891), (3973, 5375)]