21318830

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{163991}}^1$

素因数の和:164011

約数の個数: 16

約数和(自身を含む): 41325984

約数和(自身を除く): 20007154

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 163991, 327982, 819955, 1639910, 2131883, 4263766, 10659415, 21318830]

約数ペア:

[(1, 21318830), (2, 10659415), (5, 4263766), (10, 2131883), (13, 1639910), (26, 819955), (65, 327982), (130, 163991)]