643984

素因数分解:

$2^4\times {\mathrm{11}}^1\times {\mathrm{3659}}^1$

素因数の和:3678

約数の個数: 20

約数和(自身を含む): 1361520

約数和(自身を除く): 717536

約数列:

[1, 2, 4, 8, 11, 16, 22, 44, 88, 176, 3659, 7318, 14636, 29272, 40249, 58544, 80498, 160996, 321992, 643984]

約数ペア:

[(1, 643984), (2, 321992), (4, 160996), (8, 80498), (11, 58544), (16, 40249), (22, 29272), (44, 14636), (88, 7318), (176, 3659)]