21320590

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{30029}}^1$

素因数の和:30107

約数の個数: 16

約数和(自身を含む): 38918880

約数和(自身を除く): 17598290

約数列:

[1, 2, 5, 10, 71, 142, 355, 710, 30029, 60058, 150145, 300290, 2132059, 4264118, 10660295, 21320590]

約数ペア:

[(1, 21320590), (2, 10660295), (5, 4264118), (10, 2132059), (71, 300290), (142, 150145), (355, 60058), (710, 30029)]