20824900

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{167}}^1$

素因数の和:253

約数の個数: 72

約数和(自身を含む): 48121920

約数和(自身を除く): 27297020

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 43, 50, 58, 86, 100, 116, 145, 167, 172, 215, 290, 334, 430, 580, 668, 725, 835, 860, 1075, 1247, 1450, 1670, 2150, 2494, 2900, 3340, 4175, 4300, 4843, 4988, 6235, 7181, 8350, 9686, 12470, 14362, 16700, 19372, 24215, 24940, 28724, 31175, 35905, 48430, 62350, 71810, 96860, 121075, 124700, 143620, 179525, 208249, 242150, 359050, 416498, 484300, 718100, 832996, 1041245, 2082490, 4164980, 5206225, 10412450, 20824900]

約数ペア:

[(1, 20824900), (2, 10412450), (4, 5206225), (5, 4164980), (10, 2082490), (20, 1041245), (25, 832996), (29, 718100), (43, 484300), (50, 416498), (58, 359050), (86, 242150), (100, 208249), (116, 179525), (145, 143620), (167, 124700), (172, 121075), (215, 96860), (290, 71810), (334, 62350), (430, 48430), (580, 35905), (668, 31175), (725, 28724), (835, 24940), (860, 24215), (1075, 19372), (1247, 16700), (1450, 14362), (1670, 12470), (2150, 9686), (2494, 8350), (2900, 7181), (3340, 6235), (4175, 4988), (4300, 4843)]