21180542

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{139}}^1\times {\mathrm{1249}}^1$

素因数の和:1451

約数の個数: 16

約数和(自身を含む): 32550000

約数和(自身を除く): 11369458

約数列:

[1, 2, 61, 122, 139, 278, 1249, 2498, 8479, 16958, 76189, 152378, 173611, 347222, 10590271, 21180542]

約数ペア:

[(1, 21180542), (2, 10590271), (61, 347222), (122, 173611), (139, 152378), (278, 76189), (1249, 16958), (2498, 8479)]