2020009720

素因数分解:

$2^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{196499}}^1$

素因数の和:196767

約数の個数: 32

約数和(自身を含む): 4562730000

約数和(自身を除く): 2542720280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 257, 514, 1028, 1285, 2056, 2570, 5140, 10280, 196499, 392998, 785996, 982495, 1571992, 1964990, 3929980, 7859960, 50500243, 101000486, 202000972, 252501215, 404001944, 505002430, 1010004860, 2020009720]

約数ペア:

[(1, 2020009720), (2, 1010004860), (4, 505002430), (5, 404001944), (8, 252501215), (10, 202000972), (20, 101000486), (40, 50500243), (257, 7859960), (514, 3929980), (1028, 1964990), (1285, 1571992), (2056, 982495), (2570, 785996), (5140, 392998), (10280, 196499)]