64721840

素因数分解:

$2^4\times 5^1\times {\mathrm{809023}}^1$

素因数の和:809036

約数の個数: 20

約数和(自身を含む): 150478464

約数和(自身を除く): 85756624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 809023, 1618046, 3236092, 4045115, 6472184, 8090230, 12944368, 16180460, 32360920, 64721840]

約数ペア:

[(1, 64721840), (2, 32360920), (4, 16180460), (5, 12944368), (8, 8090230), (10, 6472184), (16, 4045115), (20, 3236092), (40, 1618046), (80, 809023)]