4005640

素因数分解:

$2^3\times 5^1\times {\mathrm{239}}^1\times {\mathrm{419}}^1$

素因数の和:669

約数の個数: 32

約数和(自身を含む): 9072000

約数和(自身を除く): 5066360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 239, 419, 478, 838, 956, 1195, 1676, 1912, 2095, 2390, 3352, 4190, 4780, 8380, 9560, 16760, 100141, 200282, 400564, 500705, 801128, 1001410, 2002820, 4005640]

約数ペア:

[(1, 4005640), (2, 2002820), (4, 1001410), (5, 801128), (8, 500705), (10, 400564), (20, 200282), (40, 100141), (239, 16760), (419, 9560), (478, 8380), (838, 4780), (956, 4190), (1195, 3352), (1676, 2390), (1912, 2095)]