221255420

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{28439}}^1$

素因数の和:28837

約数の個数: 24

約数和(自身を含む): 465847200

約数和(自身を除く): 244591780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 28439, 56878, 113756, 142195, 284390, 568780, 11062771, 22125542, 44251084, 55313855, 110627710, 221255420]

約数ペア:

[(1, 221255420), (2, 110627710), (4, 55313855), (5, 44251084), (10, 22125542), (20, 11062771), (389, 568780), (778, 284390), (1556, 142195), (1945, 113756), (3890, 56878), (7780, 28439)]