20606450

素因数分解:

$2^1\times 5^2\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:339

約数の個数: 48

約数和(自身を含む): 40920000

約数和(自身を除く): 20313550

約数列:

[1, 2, 5, 10, 19, 25, 38, 50, 95, 109, 190, 199, 218, 398, 475, 545, 950, 995, 1090, 1990, 2071, 2725, 3781, 4142, 4975, 5450, 7562, 9950, 10355, 18905, 20710, 21691, 37810, 43382, 51775, 94525, 103550, 108455, 189050, 216910, 412129, 542275, 824258, 1084550, 2060645, 4121290, 10303225, 20606450]

約数ペア:

[(1, 20606450), (2, 10303225), (5, 4121290), (10, 2060645), (19, 1084550), (25, 824258), (38, 542275), (50, 412129), (95, 216910), (109, 189050), (190, 108455), (199, 103550), (218, 94525), (398, 51775), (475, 43382), (545, 37810), (950, 21691), (995, 20710), (1090, 18905), (1990, 10355), (2071, 9950), (2725, 7562), (3781, 5450), (4142, 4975)]