21645280

素因数分解:

$2^5\times 5^1\times {\mathrm{135283}}^1$

素因数の和:135298

約数の個数: 24

約数和(自身を含む): 51137352

約数和(自身を除く): 29492072

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 135283, 270566, 541132, 676415, 1082264, 1352830, 2164528, 2705660, 4329056, 5411320, 10822640, 21645280]

約数ペア:

[(1, 21645280), (2, 10822640), (4, 5411320), (5, 4329056), (8, 2705660), (10, 2164528), (16, 1352830), (20, 1082264), (32, 676415), (40, 541132), (80, 270566), (160, 135283)]