21387015

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{36559}}^1$

素因数の和:36583

約数の個数: 24

約数和(自身を含む): 39923520

約数和(自身を除く): 18536505

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 36559, 109677, 182795, 329031, 475267, 548385, 1425801, 1645155, 2376335, 4277403, 7129005, 21387015]

約数ペア:

[(1, 21387015), (3, 7129005), (5, 4277403), (9, 2376335), (13, 1645155), (15, 1425801), (39, 548385), (45, 475267), (65, 329031), (117, 182795), (195, 109677), (585, 36559)]