19765700

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1$

素因数の和:237

約数の個数: 72

約数和(自身を含む): 46038720

約数和(自身を除く): 26273020

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 101, 103, 190, 202, 206, 380, 404, 412, 475, 505, 515, 950, 1010, 1030, 1900, 1919, 1957, 2020, 2060, 2525, 2575, 3838, 3914, 5050, 5150, 7676, 7828, 9595, 9785, 10100, 10300, 10403, 19190, 19570, 20806, 38380, 39140, 41612, 47975, 48925, 52015, 95950, 97850, 104030, 191900, 195700, 197657, 208060, 260075, 395314, 520150, 790628, 988285, 1040300, 1976570, 3953140, 4941425, 9882850, 19765700]

約数ペア:

[(1, 19765700), (2, 9882850), (4, 4941425), (5, 3953140), (10, 1976570), (19, 1040300), (20, 988285), (25, 790628), (38, 520150), (50, 395314), (76, 260075), (95, 208060), (100, 197657), (101, 195700), (103, 191900), (190, 104030), (202, 97850), (206, 95950), (380, 52015), (404, 48925), (412, 47975), (475, 41612), (505, 39140), (515, 38380), (950, 20806), (1010, 19570), (1030, 19190), (1900, 10403), (1919, 10300), (1957, 10100), (2020, 9785), (2060, 9595), (2525, 7828), (2575, 7676), (3838, 5150), (3914, 5050)]