21220431

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{149}}^1\times {\mathrm{1637}}^1$

素因数の和:1818

約数の個数: 16

約数和(自身を含む): 29484000

約数和(自身を除く): 8263569

約数列:

[1, 3, 29, 87, 149, 447, 1637, 4321, 4911, 12963, 47473, 142419, 243913, 731739, 7073477, 21220431]

約数ペア:

[(1, 21220431), (3, 7073477), (29, 731739), (87, 243913), (149, 142419), (447, 47473), (1637, 12963), (4321, 4911)]