21697785

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{10259}}^1$

素因数の和:10317

約数の個数: 24

約数和(自身を含む): 38413440

約数和(自身を除く): 16715655

約数列:

[1, 3, 5, 9, 15, 45, 47, 141, 235, 423, 705, 2115, 10259, 30777, 51295, 92331, 153885, 461655, 482173, 1446519, 2410865, 4339557, 7232595, 21697785]

約数ペア:

[(1, 21697785), (3, 7232595), (5, 4339557), (9, 2410865), (15, 1446519), (45, 482173), (47, 461655), (141, 153885), (235, 92331), (423, 51295), (705, 30777), (2115, 10259)]