20648720

素因数分解:

$2^4\times 5^1\times {\mathrm{258109}}^1$

素因数の和:258122

約数の個数: 20

約数和(自身を含む): 48008460

約数和(自身を除く): 27359740

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 258109, 516218, 1032436, 1290545, 2064872, 2581090, 4129744, 5162180, 10324360, 20648720]

約数ペア:

[(1, 20648720), (2, 10324360), (4, 5162180), (5, 4129744), (8, 2581090), (10, 2064872), (16, 1290545), (20, 1032436), (40, 516218), (80, 258109)]