64751920

素因数分解:

$2^4\times 5^1\times {\mathrm{809399}}^1$

素因数の和:809412

約数の個数: 20

約数和(自身を含む): 150548400

約数和(自身を除く): 85796480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 809399, 1618798, 3237596, 4046995, 6475192, 8093990, 12950384, 16187980, 32375960, 64751920]

約数ペア:

[(1, 64751920), (2, 32375960), (4, 16187980), (5, 12950384), (8, 8093990), (10, 6475192), (16, 4046995), (20, 3237596), (40, 1618798), (80, 809399)]