21213380

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{14939}}^1$

素因数の和:15019

約数の個数: 24

約数和(自身を含む): 45178560

約数和(自身を除く): 23965180

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 14939, 29878, 59756, 74695, 149390, 298780, 1060669, 2121338, 4242676, 5303345, 10606690, 21213380]

約数ペア:

[(1, 21213380), (2, 10606690), (4, 5303345), (5, 4242676), (10, 2121338), (20, 1060669), (71, 298780), (142, 149390), (284, 74695), (355, 59756), (710, 29878), (1420, 14939)]