21510765

素因数分解:

$3^4\times 5^1\times {\mathrm{53113}}^1$

素因数の和:53130

約数の個数: 20

約数和(自身を含む): 38560764

約数和(自身を除く): 17049999

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 53113, 159339, 265565, 478017, 796695, 1434051, 2390085, 4302153, 7170255, 21510765]

約数ペア:

[(1, 21510765), (3, 7170255), (5, 4302153), (9, 2390085), (15, 1434051), (27, 796695), (45, 478017), (81, 265565), (135, 159339), (405, 53113)]