281587420

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{198301}}^1$

素因数の和:198381

約数の個数: 24

約数和(自身を含む): 599665248

約数和(自身を除く): 318077828

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 198301, 396602, 793204, 991505, 1983010, 3966020, 14079371, 28158742, 56317484, 70396855, 140793710, 281587420]

約数ペア:

[(1, 281587420), (2, 140793710), (4, 70396855), (5, 56317484), (10, 28158742), (20, 14079371), (71, 3966020), (142, 1983010), (284, 991505), (355, 793204), (710, 396602), (1420, 198301)]