21465140

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{26177}}^1$

素因数の和:26227

約数の個数: 24

約数和(自身を含む): 46177992

約数和(自身を除く): 24712852

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 26177, 52354, 104708, 130885, 261770, 523540, 1073257, 2146514, 4293028, 5366285, 10732570, 21465140]

約数ペア:

[(1, 21465140), (2, 10732570), (4, 5366285), (5, 4293028), (10, 2146514), (20, 1073257), (41, 523540), (82, 261770), (164, 130885), (205, 104708), (410, 52354), (820, 26177)]