21390975

素因数分解:

$3^2\times 5^2\times {\mathrm{95071}}^1$

素因数の和:95087

約数の個数: 18

約数和(自身を含む): 38314016

約数和(自身を除く): 16923041

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 225, 95071, 285213, 475355, 855639, 1426065, 2376775, 4278195, 7130325, 21390975]

約数ペア:

[(1, 21390975), (3, 7130325), (5, 4278195), (9, 2376775), (15, 1426065), (25, 855639), (45, 475355), (75, 285213), (225, 95071)]