81071920

素因数分解:

$2^4\times 5^1\times {\mathrm{1013399}}^1$

素因数の和:1013412

約数の個数: 20

約数和(自身を含む): 188492400

約数和(自身を除く): 107420480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1013399, 2026798, 4053596, 5066995, 8107192, 10133990, 16214384, 20267980, 40535960, 81071920]

約数ペア:

[(1, 81071920), (2, 40535960), (4, 20267980), (5, 16214384), (8, 10133990), (10, 8107192), (16, 5066995), (20, 4053596), (40, 2026798), (80, 1013399)]