21019790

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{191089}}^1$

素因数の和:191107

約数の個数: 16

約数和(自身を含む): 41275440

約数和(自身を除く): 20255650

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 191089, 382178, 955445, 1910890, 2101979, 4203958, 10509895, 21019790]

約数ペア:

[(1, 21019790), (2, 10509895), (5, 4203958), (10, 2101979), (11, 1910890), (22, 955445), (55, 382178), (110, 191089)]