20525757

素因数分解:

$3^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{7349}}^1$

素因数の和:7385

約数の個数: 24

約数和(自身を含む): 33516000

約数和(自身を除く): 12990243

約数列:

[1, 3, 7, 19, 21, 49, 57, 133, 147, 399, 931, 2793, 7349, 22047, 51443, 139631, 154329, 360101, 418893, 977417, 1080303, 2932251, 6841919, 20525757]

約数ペア:

[(1, 20525757), (3, 6841919), (7, 2932251), (19, 1080303), (21, 977417), (49, 418893), (57, 360101), (133, 154329), (147, 139631), (399, 51443), (931, 22047), (2793, 7349)]