20187820

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{32561}}^1$

素因数の和:32601

約数の個数: 24

約数和(自身を含む): 43763328

約数和(自身を除く): 23575508

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 32561, 65122, 130244, 162805, 325610, 651220, 1009391, 2018782, 4037564, 5046955, 10093910, 20187820]

約数ペア:

[(1, 20187820), (2, 10093910), (4, 5046955), (5, 4037564), (10, 2018782), (20, 1009391), (31, 651220), (62, 325610), (124, 162805), (155, 130244), (310, 65122), (620, 32561)]