20785640

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3793}}^1$

素因数の和:3941

約数の個数: 32

約数和(自身を含む): 47121480

約数和(自身を除く): 26335840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3793, 5480, 7586, 15172, 18965, 30344, 37930, 75860, 151720, 519641, 1039282, 2078564, 2598205, 4157128, 5196410, 10392820, 20785640]

約数ペア:

[(1, 20785640), (2, 10392820), (4, 5196410), (5, 4157128), (8, 2598205), (10, 2078564), (20, 1039282), (40, 519641), (137, 151720), (274, 75860), (548, 37930), (685, 30344), (1096, 18965), (1370, 15172), (2740, 7586), (3793, 5480)]