18918205

素因数分解:

$5^1\times {\mathrm{19}}^2\times {\mathrm{47}}^1\times {\mathrm{223}}^1$

素因数の和:313

約数の個数: 24

約数和(自身を含む): 24579072

約数和(自身を除く): 5660867

約数列:

[1, 5, 19, 47, 95, 223, 235, 361, 893, 1115, 1805, 4237, 4465, 10481, 16967, 21185, 52405, 80503, 84835, 199139, 402515, 995695, 3783641, 18918205]

約数ペア:

[(1, 18918205), (5, 3783641), (19, 995695), (47, 402515), (95, 199139), (223, 84835), (235, 80503), (361, 52405), (893, 21185), (1115, 16967), (1805, 10481), (4237, 4465)]