21493215

素因数分解:

$3^3\times 5^1\times {\mathrm{159209}}^1$

素因数の和:159223

約数の個数: 16

約数和(自身を含む): 38210400

約数和(自身を除く): 16717185

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 159209, 477627, 796045, 1432881, 2388135, 4298643, 7164405, 21493215]

約数ペア:

[(1, 21493215), (3, 7164405), (5, 4298643), (9, 2388135), (15, 1432881), (27, 796045), (45, 477627), (135, 159209)]