21309460

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13487}}^1$

素因数の和:13575

約数の個数: 24

約数和(自身を含む): 45319680

約数和(自身を除く): 24010220

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13487, 26974, 53948, 67435, 134870, 269740, 1065473, 2130946, 4261892, 5327365, 10654730, 21309460]

約数ペア:

[(1, 21309460), (2, 10654730), (4, 5327365), (5, 4261892), (10, 2130946), (20, 1065473), (79, 269740), (158, 134870), (316, 67435), (395, 53948), (790, 26974), (1580, 13487)]