21228685

素因数分解:

$5^1\times {\mathrm{101}}^1\times {\mathrm{127}}^1\times {\mathrm{331}}^1$

素因数の和:564

約数の個数: 16

約数和(自身を含む): 26007552

約数和(自身を除く): 4778867

約数列:

[1, 5, 101, 127, 331, 505, 635, 1655, 12827, 33431, 42037, 64135, 167155, 210185, 4245737, 21228685]

約数ペア:

[(1, 21228685), (5, 4245737), (101, 210185), (127, 167155), (331, 64135), (505, 42037), (635, 33431), (1655, 12827)]