20157879

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{2659}}^1$

素因数の和:2707

約数の個数: 24

約数和(自身を含む): 32430720

約数和(自身を除く): 12272841

約数列:

[1, 3, 7, 19, 21, 57, 133, 361, 399, 1083, 2527, 2659, 7581, 7977, 18613, 50521, 55839, 151563, 353647, 959899, 1060941, 2879697, 6719293, 20157879]

約数ペア:

[(1, 20157879), (3, 6719293), (7, 2879697), (19, 1060941), (21, 959899), (57, 353647), (133, 151563), (361, 55839), (399, 50521), (1083, 18613), (2527, 7977), (2659, 7581)]