4001780

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{10531}}^1$

素因数の和:10559

約数の個数: 24

約数和(自身を含む): 8846880

約数和(自身を除く): 4845100

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 10531, 21062, 42124, 52655, 105310, 200089, 210620, 400178, 800356, 1000445, 2000890, 4001780]

約数ペア:

[(1, 4001780), (2, 2000890), (4, 1000445), (5, 800356), (10, 400178), (19, 210620), (20, 200089), (38, 105310), (76, 52655), (95, 42124), (190, 21062), (380, 10531)]