21325640

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{76163}}^1$

素因数の和:76181

約数の個数: 32

約数和(自身を含む): 54838080

約数和(自身を除く): 33512440

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 76163, 152326, 304652, 380815, 533141, 609304, 761630, 1066282, 1523260, 2132564, 2665705, 3046520, 4265128, 5331410, 10662820, 21325640]

約数ペア:

[(1, 21325640), (2, 10662820), (4, 5331410), (5, 4265128), (7, 3046520), (8, 2665705), (10, 2132564), (14, 1523260), (20, 1066282), (28, 761630), (35, 609304), (40, 533141), (56, 380815), (70, 304652), (140, 152326), (280, 76163)]