21690088

素因数分解:

$2^3\times 7^1\times {\mathrm{409}}^1\times {\mathrm{947}}^1$

素因数の和:1369

約数の個数: 32

約数和(自身を含む): 46641600

約数和(自身を除く): 24951512

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 409, 818, 947, 1636, 1894, 2863, 3272, 3788, 5726, 6629, 7576, 11452, 13258, 22904, 26516, 53032, 387323, 774646, 1549292, 2711261, 3098584, 5422522, 10845044, 21690088]

約数ペア:

[(1, 21690088), (2, 10845044), (4, 5422522), (7, 3098584), (8, 2711261), (14, 1549292), (28, 774646), (56, 387323), (409, 53032), (818, 26516), (947, 22904), (1636, 13258), (1894, 11452), (2863, 7576), (3272, 6629), (3788, 5726)]