20857150

素因数分解:

$2^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1$

素因数の和:253

約数の個数: 48

約数和(自身を含む): 40510800

約数和(自身を除く): 19653650

約数列:

[1, 2, 5, 10, 25, 43, 50, 86, 89, 109, 178, 215, 218, 430, 445, 545, 890, 1075, 1090, 2150, 2225, 2725, 3827, 4450, 4687, 5450, 7654, 9374, 9701, 19135, 19402, 23435, 38270, 46870, 48505, 95675, 97010, 117175, 191350, 234350, 242525, 417143, 485050, 834286, 2085715, 4171430, 10428575, 20857150]

約数ペア:

[(1, 20857150), (2, 10428575), (5, 4171430), (10, 2085715), (25, 834286), (43, 485050), (50, 417143), (86, 242525), (89, 234350), (109, 191350), (178, 117175), (215, 97010), (218, 95675), (430, 48505), (445, 46870), (545, 38270), (890, 23435), (1075, 19402), (1090, 19135), (2150, 9701), (2225, 9374), (2725, 7654), (3827, 5450), (4450, 4687)]