21705740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{227}}^1\times {\mathrm{683}}^1$

素因数の和:926

約数の個数: 48

約数和(自身を含む): 52399872

約数和(自身を除く): 30694132

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 227, 454, 683, 908, 1135, 1366, 1589, 2270, 2732, 3178, 3415, 4540, 4781, 6356, 6830, 7945, 9562, 13660, 15890, 19124, 23905, 31780, 47810, 95620, 155041, 310082, 620164, 775205, 1085287, 1550410, 2170574, 3100820, 4341148, 5426435, 10852870, 21705740]

約数ペア:

[(1, 21705740), (2, 10852870), (4, 5426435), (5, 4341148), (7, 3100820), (10, 2170574), (14, 1550410), (20, 1085287), (28, 775205), (35, 620164), (70, 310082), (140, 155041), (227, 95620), (454, 47810), (683, 31780), (908, 23905), (1135, 19124), (1366, 15890), (1589, 13660), (2270, 9562), (2732, 7945), (3178, 6830), (3415, 6356), (4540, 4781)]