21171855

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{59}}^1\times {\mathrm{509}}^1$

素因数の和:623

約数の個数: 32

約数和(自身を含む): 35251200

約数和(自身を除く): 14079345

約数列:

[1, 3, 5, 15, 47, 59, 141, 177, 235, 295, 509, 705, 885, 1527, 2545, 2773, 7635, 8319, 13865, 23923, 30031, 41595, 71769, 90093, 119615, 150155, 358845, 450465, 1411457, 4234371, 7057285, 21171855]

約数ペア:

[(1, 21171855), (3, 7057285), (5, 4234371), (15, 1411457), (47, 450465), (59, 358845), (141, 150155), (177, 119615), (235, 90093), (295, 71769), (509, 41595), (705, 30031), (885, 23923), (1527, 13865), (2545, 8319), (2773, 7635)]