21216388

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{2609}}^1$

素因数の和:2739

約数の個数: 24

約数和(自身を含む): 39463200

約数和(自身を除く): 18246812

約数列:

[1, 2, 4, 19, 38, 76, 107, 214, 428, 2033, 2609, 4066, 5218, 8132, 10436, 49571, 99142, 198284, 279163, 558326, 1116652, 5304097, 10608194, 21216388]

約数ペア:

[(1, 21216388), (2, 10608194), (4, 5304097), (19, 1116652), (38, 558326), (76, 279163), (107, 198284), (214, 99142), (428, 49571), (2033, 10436), (2609, 8132), (4066, 5218)]