20905010

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{4091}}^1$

素因数の和:4178

約数の個数: 32

約数和(自身を含む): 43604352

約数和(自身を除く): 22699342

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 73, 146, 365, 511, 730, 1022, 2555, 4091, 5110, 8182, 20455, 28637, 40910, 57274, 143185, 286370, 298643, 597286, 1493215, 2090501, 2986430, 4181002, 10452505, 20905010]

約数ペア:

[(1, 20905010), (2, 10452505), (5, 4181002), (7, 2986430), (10, 2090501), (14, 1493215), (35, 597286), (70, 298643), (73, 286370), (146, 143185), (365, 57274), (511, 40910), (730, 28637), (1022, 20455), (2555, 8182), (4091, 5110)]