20881305

素因数分解:

$3^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{16001}}^1$

素因数の和:16041

約数の個数: 24

約数和(自身を含む): 37444680

約数和(自身を除く): 16563375

約数列:

[1, 3, 5, 9, 15, 29, 45, 87, 145, 261, 435, 1305, 16001, 48003, 80005, 144009, 240015, 464029, 720045, 1392087, 2320145, 4176261, 6960435, 20881305]

約数ペア:

[(1, 20881305), (3, 6960435), (5, 4176261), (9, 2320145), (15, 1392087), (29, 720045), (45, 464029), (87, 240015), (145, 144009), (261, 80005), (435, 48003), (1305, 16001)]