20865740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{1447}}^1$

素因数の和:1566

約数の個数: 48

約数和(自身を含む): 50598912

約数和(自身を除く): 29733172

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 103, 140, 206, 412, 515, 721, 1030, 1442, 1447, 2060, 2884, 2894, 3605, 5788, 7210, 7235, 10129, 14420, 14470, 20258, 28940, 40516, 50645, 101290, 149041, 202580, 298082, 596164, 745205, 1043287, 1490410, 2086574, 2980820, 4173148, 5216435, 10432870, 20865740]

約数ペア:

[(1, 20865740), (2, 10432870), (4, 5216435), (5, 4173148), (7, 2980820), (10, 2086574), (14, 1490410), (20, 1043287), (28, 745205), (35, 596164), (70, 298082), (103, 202580), (140, 149041), (206, 101290), (412, 50645), (515, 40516), (721, 28940), (1030, 20258), (1442, 14470), (1447, 14420), (2060, 10129), (2884, 7235), (2894, 7210), (3605, 5788)]