51140560

素因数分解:

$2^4\times 5^1\times {\mathrm{639257}}^1$

素因数の和:639270

約数の個数: 20

約数和(自身を含む): 118901988

約数和(自身を除く): 67761428

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 639257, 1278514, 2557028, 3196285, 5114056, 6392570, 10228112, 12785140, 25570280, 51140560]

約数ペア:

[(1, 51140560), (2, 25570280), (4, 12785140), (5, 10228112), (8, 6392570), (10, 5114056), (16, 3196285), (20, 2557028), (40, 1278514), (80, 639257)]