20885985

素因数分解:

$3^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{1181}}^1$

素因数の和:1326

約数の個数: 32

約数和(自身を含む): 37445760

約数和(自身を除く): 16559775

約数列:

[1, 3, 5, 9, 15, 27, 45, 131, 135, 393, 655, 1179, 1181, 1965, 3537, 3543, 5895, 5905, 10629, 17685, 17715, 31887, 53145, 154711, 159435, 464133, 773555, 1392399, 2320665, 4177197, 6961995, 20885985]

約数ペア:

[(1, 20885985), (3, 6961995), (5, 4177197), (9, 2320665), (15, 1392399), (27, 773555), (45, 464133), (131, 159435), (135, 154711), (393, 53145), (655, 31887), (1179, 17715), (1181, 17685), (1965, 10629), (3537, 5905), (3543, 5895)]