201581780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{141959}}^1$

素因数の和:142039

約数の個数: 24

約数和(自身を含む): 429287040

約数和(自身を除く): 227705260

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 141959, 283918, 567836, 709795, 1419590, 2839180, 10079089, 20158178, 40316356, 50395445, 100790890, 201581780]

約数ペア:

[(1, 201581780), (2, 100790890), (4, 50395445), (5, 40316356), (10, 20158178), (20, 10079089), (71, 2839180), (142, 1419590), (284, 709795), (355, 567836), (710, 283918), (1420, 141959)]