21136545

素因数分解:

$3^4\times 5^1\times {\mathrm{52189}}^1$

素因数の和:52206

約数の個数: 20

約数和(自身を含む): 37889940

約数和(自身を除く): 16753395

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52189, 156567, 260945, 469701, 782835, 1409103, 2348505, 4227309, 7045515, 21136545]

約数ペア:

[(1, 21136545), (3, 7045515), (5, 4227309), (9, 2348505), (15, 1409103), (27, 782835), (45, 469701), (81, 260945), (135, 156567), (405, 52189)]