21013155

素因数分解:

$3^3\times 5^1\times {\mathrm{155653}}^1$

素因数の和:155667

約数の個数: 16

約数和(自身を含む): 37356960

約数和(自身を除く): 16343805

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155653, 466959, 778265, 1400877, 2334795, 4202631, 7004385, 21013155]

約数ペア:

[(1, 21013155), (3, 7004385), (5, 4202631), (9, 2334795), (15, 1400877), (27, 778265), (45, 466959), (135, 155653)]