20984979

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{191}}^1\times {\mathrm{691}}^1$

素因数の和:938

約数の個数: 16

約数和(自身を含む): 28698624

約数和(自身を除く): 7713645

約数列:

[1, 3, 53, 159, 191, 573, 691, 2073, 10123, 30369, 36623, 109869, 131981, 395943, 6994993, 20984979]

約数ペア:

[(1, 20984979), (3, 6994993), (53, 395943), (159, 131981), (191, 109869), (573, 36623), (691, 30369), (2073, 10123)]