21999879

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{359}}^1\times {\mathrm{619}}^1$

素因数の和:995

約数の個数: 24

約数和(自身を含む): 34819200

約数和(自身を除く): 12819321

約数列:

[1, 3, 9, 11, 33, 99, 359, 619, 1077, 1857, 3231, 3949, 5571, 6809, 11847, 20427, 35541, 61281, 222221, 666663, 1999989, 2444431, 7333293, 21999879]

約数ペア:

[(1, 21999879), (3, 7333293), (9, 2444431), (11, 1999989), (33, 666663), (99, 222221), (359, 61281), (619, 35541), (1077, 20427), (1857, 11847), (3231, 6809), (3949, 5571)]