20356780

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^2\times {\mathrm{191}}^1$

素因数の和:346

約数の個数: 36

約数和(自身を含む): 43569792

約数和(自身を除く): 23213012

約数列:

[1, 2, 4, 5, 10, 20, 73, 146, 191, 292, 365, 382, 730, 764, 955, 1460, 1910, 3820, 5329, 10658, 13943, 21316, 26645, 27886, 53290, 55772, 69715, 106580, 139430, 278860, 1017839, 2035678, 4071356, 5089195, 10178390, 20356780]

約数ペア:

[(1, 20356780), (2, 10178390), (4, 5089195), (5, 4071356), (10, 2035678), (20, 1017839), (73, 278860), (146, 139430), (191, 106580), (292, 69715), (365, 55772), (382, 53290), (730, 27886), (764, 26645), (955, 21316), (1460, 13943), (1910, 10658), (3820, 5329)]