13290440

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{7727}}^1$

素因数の和:7781

約数の個数: 32

約数和(自身を含む): 30602880

約数和(自身を除く): 17312440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 7727, 15454, 30908, 38635, 61816, 77270, 154540, 309080, 332261, 664522, 1329044, 1661305, 2658088, 3322610, 6645220, 13290440]

約数ペア:

[(1, 13290440), (2, 6645220), (4, 3322610), (5, 2658088), (8, 1661305), (10, 1329044), (20, 664522), (40, 332261), (43, 309080), (86, 154540), (172, 77270), (215, 61816), (344, 38635), (430, 30908), (860, 15454), (1720, 7727)]