21194855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^2\times {\mathrm{401}}^1$

素因数の和:479

約数の個数: 24

約数和(自身を含む): 28741392

約数和(自身を除く): 7546537

約数列:

[1, 5, 11, 31, 55, 155, 341, 401, 961, 1705, 2005, 4411, 4805, 10571, 12431, 22055, 52855, 62155, 136741, 385361, 683705, 1926805, 4238971, 21194855]

約数ペア:

[(1, 21194855), (5, 4238971), (11, 1926805), (31, 683705), (55, 385361), (155, 136741), (341, 62155), (401, 52855), (961, 22055), (1705, 12431), (2005, 10571), (4411, 4805)]