21647440

素因数分解:

$2^4\times 5^1\times {\mathrm{270593}}^1$

素因数の和:270606

約数の個数: 20

約数和(自身を含む): 50330484

約数和(自身を除く): 28683044

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270593, 541186, 1082372, 1352965, 2164744, 2705930, 4329488, 5411860, 10823720, 21647440]

約数ペア:

[(1, 21647440), (2, 10823720), (4, 5411860), (5, 4329488), (8, 2705930), (10, 2164744), (16, 1352965), (20, 1082372), (40, 541186), (80, 270593)]