81211540

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{37253}}^1$

素因数の和:37371

約数の個数: 24

約数和(自身を含む): 172113480

約数和(自身を除く): 90901940

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 37253, 74506, 149012, 186265, 372530, 745060, 4060577, 8121154, 16242308, 20302885, 40605770, 81211540]

約数ペア:

[(1, 81211540), (2, 40605770), (4, 20302885), (5, 16242308), (10, 8121154), (20, 4060577), (109, 745060), (218, 372530), (436, 186265), (545, 149012), (1090, 74506), (2180, 37253)]