399376

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{229}}^1$

素因数の和:346

約数の個数: 20

約数和(自身を含む): 784300

約数和(自身を除く): 384924

約数列:

[1, 2, 4, 8, 16, 109, 218, 229, 436, 458, 872, 916, 1744, 1832, 3664, 24961, 49922, 99844, 199688, 399376]

約数ペア:

[(1, 399376), (2, 199688), (4, 99844), (8, 49922), (16, 24961), (109, 3664), (218, 1832), (229, 1744), (436, 916), (458, 872)]