81052040

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{5209}}^1$

素因数の和:5609

約数の個数: 32

約数和(自身を含む): 182871000

約数和(自身を除く): 101818960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1556, 1945, 3112, 3890, 5209, 7780, 10418, 15560, 20836, 26045, 41672, 52090, 104180, 208360, 2026301, 4052602, 8105204, 10131505, 16210408, 20263010, 40526020, 81052040]

約数ペア:

[(1, 81052040), (2, 40526020), (4, 20263010), (5, 16210408), (8, 10131505), (10, 8105204), (20, 4052602), (40, 2026301), (389, 208360), (778, 104180), (1556, 52090), (1945, 41672), (3112, 26045), (3890, 20836), (5209, 15560), (7780, 10418)]