981220

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{691}}^1$

素因数の和:771

約数の個数: 24

約数和(自身を含む): 2092608

約数和(自身を除く): 1111388

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 691, 710, 1382, 1420, 2764, 3455, 6910, 13820, 49061, 98122, 196244, 245305, 490610, 981220]

約数ペア:

[(1, 981220), (2, 490610), (4, 245305), (5, 196244), (10, 98122), (20, 49061), (71, 13820), (142, 6910), (284, 3455), (355, 2764), (691, 1420), (710, 1382)]