19965680

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{101}}^1\times {\mathrm{353}}^1$

素因数の和:474

約数の個数: 80

約数和(自身を含む): 53728704

約数和(自身を除く): 33763024

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 101, 112, 140, 202, 280, 353, 404, 505, 560, 706, 707, 808, 1010, 1412, 1414, 1616, 1765, 2020, 2471, 2824, 2828, 3530, 3535, 4040, 4942, 5648, 5656, 7060, 7070, 8080, 9884, 11312, 12355, 14120, 14140, 19768, 24710, 28240, 28280, 35653, 39536, 49420, 56560, 71306, 98840, 142612, 178265, 197680, 249571, 285224, 356530, 499142, 570448, 713060, 998284, 1247855, 1426120, 1996568, 2495710, 2852240, 3993136, 4991420, 9982840, 19965680]

約数ペア:

[(1, 19965680), (2, 9982840), (4, 4991420), (5, 3993136), (7, 2852240), (8, 2495710), (10, 1996568), (14, 1426120), (16, 1247855), (20, 998284), (28, 713060), (35, 570448), (40, 499142), (56, 356530), (70, 285224), (80, 249571), (101, 197680), (112, 178265), (140, 142612), (202, 98840), (280, 71306), (353, 56560), (404, 49420), (505, 39536), (560, 35653), (706, 28280), (707, 28240), (808, 24710), (1010, 19768), (1412, 14140), (1414, 14120), (1616, 12355), (1765, 11312), (2020, 9884), (2471, 8080), (2824, 7070), (2828, 7060), (3530, 5656), (3535, 5648), (4040, 4942)]