18899937

素因数分解:

$3^2\times 7^2\times {\mathrm{17}}^1\times {\mathrm{2521}}^1$

素因数の和:2558

約数の個数: 36

約数和(自身を含む): 33638436

約数和(自身を除く): 14738499

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 63, 119, 147, 153, 357, 441, 833, 1071, 2499, 2521, 7497, 7563, 17647, 22689, 42857, 52941, 123529, 128571, 158823, 299999, 370587, 385713, 899997, 1111761, 2099993, 2699991, 6299979, 18899937]

約数ペア:

[(1, 18899937), (3, 6299979), (7, 2699991), (9, 2099993), (17, 1111761), (21, 899997), (49, 385713), (51, 370587), (63, 299999), (119, 158823), (147, 128571), (153, 123529), (357, 52941), (441, 42857), (833, 22689), (1071, 17647), (2499, 7563), (2521, 7497)]