20912885

素因数分解:

$5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{12713}}^1$

素因数の和:12772

約数の個数: 16

約数和(自身を含む): 29293056

約数和(自身を除く): 8380171

約数列:

[1, 5, 7, 35, 47, 235, 329, 1645, 12713, 63565, 88991, 444955, 597511, 2987555, 4182577, 20912885]

約数ペア:

[(1, 20912885), (5, 4182577), (7, 2987555), (35, 597511), (47, 444955), (235, 88991), (329, 63565), (1645, 12713)]