21066640

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{37619}}^1$

素因数の和:37639

約数の個数: 40

約数和(自身を含む): 55978560

約数和(自身を除く): 34911920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 56, 70, 80, 112, 140, 280, 560, 37619, 75238, 150476, 188095, 263333, 300952, 376190, 526666, 601904, 752380, 1053332, 1316665, 1504760, 2106664, 2633330, 3009520, 4213328, 5266660, 10533320, 21066640]

約数ペア:

[(1, 21066640), (2, 10533320), (4, 5266660), (5, 4213328), (7, 3009520), (8, 2633330), (10, 2106664), (14, 1504760), (16, 1316665), (20, 1053332), (28, 752380), (35, 601904), (40, 526666), (56, 376190), (70, 300952), (80, 263333), (112, 188095), (140, 150476), (280, 75238), (560, 37619)]