20491605

素因数分解:

$3^2\times 5^1\times {\mathrm{659}}^1\times {\mathrm{691}}^1$

素因数の和:1361

約数の個数: 24

約数和(自身を含む): 35624160

約数和(自身を除く): 15132555

約数列:

[1, 3, 5, 9, 15, 45, 659, 691, 1977, 2073, 3295, 3455, 5931, 6219, 9885, 10365, 29655, 31095, 455369, 1366107, 2276845, 4098321, 6830535, 20491605]

約数ペア:

[(1, 20491605), (3, 6830535), (5, 4098321), (9, 2276845), (15, 1366107), (45, 455369), (659, 31095), (691, 29655), (1977, 10365), (2073, 9885), (3295, 6219), (3455, 5931)]