20954017

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{317}}^1$

素因数の和:421

約数の個数: 24

約数和(自身を含む): 26101440

約数和(自身を除く): 5147423

約数列:

[1, 7, 19, 49, 71, 133, 317, 497, 931, 1349, 2219, 3479, 6023, 9443, 15533, 22507, 42161, 66101, 157549, 295127, 427633, 1102843, 2993431, 20954017]

約数ペア:

[(1, 20954017), (7, 2993431), (19, 1102843), (49, 427633), (71, 295127), (133, 157549), (317, 66101), (497, 42161), (931, 22507), (1349, 15533), (2219, 9443), (3479, 6023)]