20157100

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{103}}^2$

素因数の和:239

約数の個数: 54

約数和(自身を含む): 46494420

約数和(自身を除く): 26337320

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 103, 190, 206, 380, 412, 475, 515, 950, 1030, 1900, 1957, 2060, 2575, 3914, 5150, 7828, 9785, 10300, 10609, 19570, 21218, 39140, 42436, 48925, 53045, 97850, 106090, 195700, 201571, 212180, 265225, 403142, 530450, 806284, 1007855, 1060900, 2015710, 4031420, 5039275, 10078550, 20157100]

約数ペア:

[(1, 20157100), (2, 10078550), (4, 5039275), (5, 4031420), (10, 2015710), (19, 1060900), (20, 1007855), (25, 806284), (38, 530450), (50, 403142), (76, 265225), (95, 212180), (100, 201571), (103, 195700), (190, 106090), (206, 97850), (380, 53045), (412, 48925), (475, 42436), (515, 39140), (950, 21218), (1030, 19570), (1900, 10609), (1957, 10300), (2060, 9785), (2575, 7828), (3914, 5150)]