20980521

素因数分解:

$3^2\times {\mathrm{31}}^1\times {\mathrm{139}}^1\times {\mathrm{541}}^1$

素因数の和:717

約数の個数: 24

約数和(自身を含む): 31566080

約数和(自身を除く): 10585559

約数列:

[1, 3, 9, 31, 93, 139, 279, 417, 541, 1251, 1623, 4309, 4869, 12927, 16771, 38781, 50313, 75199, 150939, 225597, 676791, 2331169, 6993507, 20980521]

約数ペア:

[(1, 20980521), (3, 6993507), (9, 2331169), (31, 676791), (93, 225597), (139, 150939), (279, 75199), (417, 50313), (541, 38781), (1251, 16771), (1623, 12927), (4309, 4869)]