640690904

素因数分解:

$2^3\times 7^1\times {\mathrm{11440909}}^1$

素因数の和:11440922

約数の個数: 16

約数和(自身を含む): 1372909200

約数和(自身を除く): 732218296

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 11440909, 22881818, 45763636, 80086363, 91527272, 160172726, 320345452, 640690904]

約数ペア:

[(1, 640690904), (2, 320345452), (4, 160172726), (7, 91527272), (8, 80086363), (14, 45763636), (28, 22881818), (56, 11440909)]