21911427

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{1321}}^1$

素因数の和:1443

約数の個数: 24

約数和(自身を含む): 33684560

約数和(自身を除く): 11773133

約数列:

[1, 3, 9, 19, 57, 97, 171, 291, 873, 1321, 1843, 3963, 5529, 11889, 16587, 25099, 75297, 128137, 225891, 384411, 1153233, 2434603, 7303809, 21911427]

約数ペア:

[(1, 21911427), (3, 7303809), (9, 2434603), (19, 1153233), (57, 384411), (97, 225891), (171, 128137), (291, 75297), (873, 25099), (1321, 16587), (1843, 11889), (3963, 5529)]