21417615

素因数分解:

$3^4\times 5^1\times {\mathrm{52883}}^1$

素因数の和:52900

約数の個数: 20

約数和(自身を含む): 38393784

約数和(自身を除く): 16976169

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 52883, 158649, 264415, 475947, 793245, 1427841, 2379735, 4283523, 7139205, 21417615]

約数ペア:

[(1, 21417615), (3, 7139205), (5, 4283523), (9, 2379735), (15, 1427841), (27, 793245), (45, 475947), (81, 264415), (135, 158649), (405, 52883)]