20980771

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{283}}^1$

素因数の和:403

約数の個数: 24

約数和(自身を含む): 26224560

約数和(自身を除く): 5243789

約数列:

[1, 7, 17, 49, 89, 119, 283, 623, 833, 1513, 1981, 4361, 4811, 10591, 13867, 25187, 33677, 74137, 176309, 235739, 428179, 1234163, 2997253, 20980771]

約数ペア:

[(1, 20980771), (7, 2997253), (17, 1234163), (49, 428179), (89, 235739), (119, 176309), (283, 74137), (623, 33677), (833, 25187), (1513, 13867), (1981, 10591), (4361, 4811)]