21728325

素因数分解:

$3^1\times 5^2\times {\mathrm{281}}^1\times {\mathrm{1031}}^1$

素因数の和:1325

約数の個数: 24

約数和(自身を含む): 36086976

約数和(自身を除く): 14358651

約数列:

[1, 3, 5, 15, 25, 75, 281, 843, 1031, 1405, 3093, 4215, 5155, 7025, 15465, 21075, 25775, 77325, 289711, 869133, 1448555, 4345665, 7242775, 21728325]

約数ペア:

[(1, 21728325), (3, 7242775), (5, 4345665), (15, 1448555), (25, 869133), (75, 289711), (281, 77325), (843, 25775), (1031, 21075), (1405, 15465), (3093, 7025), (4215, 5155)]