64832720

素因数分解:

$2^4\times 5^1\times {\mathrm{810409}}^1$

素因数の和:810422

約数の個数: 20

約数和(自身を含む): 150736260

約数和(自身を除く): 85903540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810409, 1620818, 3241636, 4052045, 6483272, 8104090, 12966544, 16208180, 32416360, 64832720]

約数ペア:

[(1, 64832720), (2, 32416360), (4, 16208180), (5, 12966544), (8, 8104090), (10, 6483272), (16, 4052045), (20, 3241636), (40, 1620818), (80, 810409)]