21684640

素因数分解:

$2^5\times 5^1\times {\mathrm{313}}^1\times {\mathrm{433}}^1$

素因数の和:761

約数の個数: 48

約数和(自身を含む): 51512328

約数和(自身を除く): 29827688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 313, 433, 626, 866, 1252, 1565, 1732, 2165, 2504, 3130, 3464, 4330, 5008, 6260, 6928, 8660, 10016, 12520, 13856, 17320, 25040, 34640, 50080, 69280, 135529, 271058, 542116, 677645, 1084232, 1355290, 2168464, 2710580, 4336928, 5421160, 10842320, 21684640]

約数ペア:

[(1, 21684640), (2, 10842320), (4, 5421160), (5, 4336928), (8, 2710580), (10, 2168464), (16, 1355290), (20, 1084232), (32, 677645), (40, 542116), (80, 271058), (160, 135529), (313, 69280), (433, 50080), (626, 34640), (866, 25040), (1252, 17320), (1565, 13856), (1732, 12520), (2165, 10016), (2504, 8660), (3130, 6928), (3464, 6260), (4330, 5008)]