21378655

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{3137}}^1$

素因数の和:3218

約数の個数: 16

約数和(自身を含む): 27112320

約数和(自身を除く): 5733665

約数列:

[1, 5, 29, 47, 145, 235, 1363, 3137, 6815, 15685, 90973, 147439, 454865, 737195, 4275731, 21378655]

約数ペア:

[(1, 21378655), (5, 4275731), (29, 737195), (47, 454865), (145, 147439), (235, 90973), (1363, 15685), (3137, 6815)]