21097820

素因数分解:

$2^2\times 5^1\times {\mathrm{523}}^1\times {\mathrm{2017}}^1$

素因数の和:2549

約数の個数: 24

約数和(自身を含む): 44412144

約数和(自身を除く): 23314324

約数列:

[1, 2, 4, 5, 10, 20, 523, 1046, 2017, 2092, 2615, 4034, 5230, 8068, 10085, 10460, 20170, 40340, 1054891, 2109782, 4219564, 5274455, 10548910, 21097820]

約数ペア:

[(1, 21097820), (2, 10548910), (4, 5274455), (5, 4219564), (10, 2109782), (20, 1054891), (523, 40340), (1046, 20170), (2017, 10460), (2092, 10085), (2615, 8068), (4034, 5230)]