21168135

素因数分解:

$3^4\times 5^1\times {\mathrm{52267}}^1$

素因数の和:52284

約数の個数: 20

約数和(自身を含む): 37946568

約数和(自身を除く): 16778433

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52267, 156801, 261335, 470403, 784005, 1411209, 2352015, 4233627, 7056045, 21168135]

約数ペア:

[(1, 21168135), (3, 7056045), (5, 4233627), (9, 2352015), (15, 1411209), (27, 784005), (45, 470403), (81, 261335), (135, 156801), (405, 52267)]