21743320

素因数分解:

$2^3\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4987}}^1$

素因数の和:5107

約数の個数: 32

約数和(自身を含む): 49381200

約数和(自身を除く): 27637880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 109, 218, 436, 545, 872, 1090, 2180, 4360, 4987, 9974, 19948, 24935, 39896, 49870, 99740, 199480, 543583, 1087166, 2174332, 2717915, 4348664, 5435830, 10871660, 21743320]

約数ペア:

[(1, 21743320), (2, 10871660), (4, 5435830), (5, 4348664), (8, 2717915), (10, 2174332), (20, 1087166), (40, 543583), (109, 199480), (218, 99740), (436, 49870), (545, 39896), (872, 24935), (1090, 19948), (2180, 9974), (4360, 4987)]