21247795

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{191}}^1\times {\mathrm{1171}}^1$

素因数の和:1386

約数の個数: 16

約数和(自身を含む): 27002880

約数和(自身を除く): 5755085

約数列:

[1, 5, 19, 95, 191, 955, 1171, 3629, 5855, 18145, 22249, 111245, 223661, 1118305, 4249559, 21247795]

約数ペア:

[(1, 21247795), (5, 4249559), (19, 1118305), (95, 223661), (191, 111245), (955, 22249), (1171, 18145), (3629, 5855)]