21003165

素因数分解:

$3^3\times 5^1\times {\mathrm{155579}}^1$

素因数の和:155593

約数の個数: 16

約数和(自身を含む): 37339200

約数和(自身を除く): 16336035

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155579, 466737, 777895, 1400211, 2333685, 4200633, 7001055, 21003165]

約数ペア:

[(1, 21003165), (3, 7001055), (5, 4200633), (9, 2333685), (15, 1400211), (27, 777895), (45, 466737), (135, 155579)]