21268995

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128903}}^1$

素因数の和:128922

約数の個数: 16

約数和(自身を含む): 37124352

約数和(自身を除く): 15855357

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128903, 386709, 644515, 1417933, 1933545, 4253799, 7089665, 21268995]

約数ペア:

[(1, 21268995), (3, 7089665), (5, 4253799), (11, 1933545), (15, 1417933), (33, 644515), (55, 386709), (165, 128903)]