21031550

素因数分解:

$2^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{227}}^1$

素因数の和:365

約数の個数: 48

約数和(自身を含む): 41983920

約数和(自身を除く): 20952370

約数列:

[1, 2, 5, 10, 17, 25, 34, 50, 85, 109, 170, 218, 227, 425, 454, 545, 850, 1090, 1135, 1853, 2270, 2725, 3706, 3859, 5450, 5675, 7718, 9265, 11350, 18530, 19295, 24743, 38590, 46325, 49486, 92650, 96475, 123715, 192950, 247430, 420631, 618575, 841262, 1237150, 2103155, 4206310, 10515775, 21031550]

約数ペア:

[(1, 21031550), (2, 10515775), (5, 4206310), (10, 2103155), (17, 1237150), (25, 841262), (34, 618575), (50, 420631), (85, 247430), (109, 192950), (170, 123715), (218, 96475), (227, 92650), (425, 49486), (454, 46325), (545, 38590), (850, 24743), (1090, 19295), (1135, 18530), (1853, 11350), (2270, 9265), (2725, 7718), (3706, 5675), (3859, 5450)]