20868115

素因数分解:

$5^1\times {\mathrm{31}}^2\times {\mathrm{43}}^1\times {\mathrm{101}}^1$

素因数の和:211

約数の個数: 24

約数和(自身を含む): 26739504

約数和(自身を除く): 5871389

約数列:

[1, 5, 31, 43, 101, 155, 215, 505, 961, 1333, 3131, 4343, 4805, 6665, 15655, 21715, 41323, 97061, 134633, 206615, 485305, 673165, 4173623, 20868115]

約数ペア:

[(1, 20868115), (5, 4173623), (31, 673165), (43, 485305), (101, 206615), (155, 134633), (215, 97061), (505, 41323), (961, 21715), (1333, 15655), (3131, 6665), (4343, 4805)]