19740980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^2\times {\mathrm{103}}^1$

素因数の和:193

約数の個数: 72

約数和(自身を含む): 49166208

約数和(自身を除く): 29425228

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 103, 140, 148, 185, 206, 259, 370, 412, 515, 518, 721, 740, 1030, 1036, 1295, 1369, 1442, 2060, 2590, 2738, 2884, 3605, 3811, 5180, 5476, 6845, 7210, 7622, 9583, 13690, 14420, 15244, 19055, 19166, 26677, 27380, 38110, 38332, 47915, 53354, 76220, 95830, 106708, 133385, 141007, 191660, 266770, 282014, 533540, 564028, 705035, 987049, 1410070, 1974098, 2820140, 3948196, 4935245, 9870490, 19740980]

約数ペア:

[(1, 19740980), (2, 9870490), (4, 4935245), (5, 3948196), (7, 2820140), (10, 1974098), (14, 1410070), (20, 987049), (28, 705035), (35, 564028), (37, 533540), (70, 282014), (74, 266770), (103, 191660), (140, 141007), (148, 133385), (185, 106708), (206, 95830), (259, 76220), (370, 53354), (412, 47915), (515, 38332), (518, 38110), (721, 27380), (740, 26677), (1030, 19166), (1036, 19055), (1295, 15244), (1369, 14420), (1442, 13690), (2060, 9583), (2590, 7622), (2738, 7210), (2884, 6845), (3605, 5476), (3811, 5180)]