21643120

素因数分解:

$2^4\times 5^1\times {\mathrm{270539}}^1$

素因数の和:270552

約数の個数: 20

約数和(自身を含む): 50320440

約数和(自身を除く): 28677320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 270539, 541078, 1082156, 1352695, 2164312, 2705390, 4328624, 5410780, 10821560, 21643120]

約数ペア:

[(1, 21643120), (2, 10821560), (4, 5410780), (5, 4328624), (8, 2705390), (10, 2164312), (16, 1352695), (20, 1082156), (40, 541078), (80, 270539)]