21497960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{48859}}^1$

素因数の和:48881

約数の個数: 32

約数和(自身を含む): 52768800

約数和(自身を除く): 31270840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 48859, 97718, 195436, 244295, 390872, 488590, 537449, 977180, 1074898, 1954360, 2149796, 2687245, 4299592, 5374490, 10748980, 21497960]

約数ペア:

[(1, 21497960), (2, 10748980), (4, 5374490), (5, 4299592), (8, 2687245), (10, 2149796), (11, 1954360), (20, 1074898), (22, 977180), (40, 537449), (44, 488590), (55, 390872), (88, 244295), (110, 195436), (220, 97718), (440, 48859)]