21274245

素因数分解:

$3^4\times 5^1\times {\mathrm{52529}}^1$

素因数の和:52546

約数の個数: 20

約数和(自身を含む): 38136780

約数和(自身を除く): 16862535

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52529, 157587, 262645, 472761, 787935, 1418283, 2363805, 4254849, 7091415, 21274245]

約数ペア:

[(1, 21274245), (3, 7091415), (5, 4254849), (9, 2363805), (15, 1418283), (27, 787935), (45, 472761), (81, 262645), (135, 157587), (405, 52529)]