20218664

素因数分解:

$2^3\times {\mathrm{73}}^1\times {\mathrm{89}}^1\times {\mathrm{389}}^1$

素因数の和:557

約数の個数: 32

約数和(自身を含む): 38961000

約数和(自身を除く): 18742336

約数列:

[1, 2, 4, 8, 73, 89, 146, 178, 292, 356, 389, 584, 712, 778, 1556, 3112, 6497, 12994, 25988, 28397, 34621, 51976, 56794, 69242, 113588, 138484, 227176, 276968, 2527333, 5054666, 10109332, 20218664]

約数ペア:

[(1, 20218664), (2, 10109332), (4, 5054666), (8, 2527333), (73, 276968), (89, 227176), (146, 138484), (178, 113588), (292, 69242), (356, 56794), (389, 51976), (584, 34621), (712, 28397), (778, 25988), (1556, 12994), (3112, 6497)]