21813580

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{6947}}^1$

素因数の和:7113

約数の個数: 24

約数和(自身を含む): 46106928

約数和(自身を除く): 24293348

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 6947, 13894, 27788, 34735, 69470, 138940, 1090679, 2181358, 4362716, 5453395, 10906790, 21813580]

約数ペア:

[(1, 21813580), (2, 10906790), (4, 5453395), (5, 4362716), (10, 2181358), (20, 1090679), (157, 138940), (314, 69470), (628, 34735), (785, 27788), (1570, 13894), (3140, 6947)]