21812830

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12907}}^1$

素因数の和:12940

約数の個数: 24

約数和(自身を含む): 42518952

約数和(自身を除く): 20706122

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12907, 25814, 64535, 129070, 167791, 335582, 838955, 1677910, 2181283, 4362566, 10906415, 21812830]

約数ペア:

[(1, 21812830), (2, 10906415), (5, 4362566), (10, 2181283), (13, 1677910), (26, 838955), (65, 335582), (130, 167791), (169, 129070), (338, 64535), (845, 25814), (1690, 12907)]