998440

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{229}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 2277000

約数和(自身を除く): 1278560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 229, 436, 458, 545, 872, 916, 1090, 1145, 1832, 2180, 2290, 4360, 4580, 9160, 24961, 49922, 99844, 124805, 199688, 249610, 499220, 998440]

約数ペア:

[(1, 998440), (2, 499220), (4, 249610), (5, 199688), (8, 124805), (10, 99844), (20, 49922), (40, 24961), (109, 9160), (218, 4580), (229, 4360), (436, 2290), (458, 2180), (545, 1832), (872, 1145), (916, 1090)]