19991015

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{173}}^1\times {\mathrm{191}}^1$

素因数の和:391

約数の個数: 24

約数和(自身を含む): 26659584

約数和(自身を除く): 6668569

約数列:

[1, 5, 11, 55, 121, 173, 191, 605, 865, 955, 1903, 2101, 9515, 10505, 20933, 23111, 33043, 104665, 115555, 165215, 363473, 1817365, 3998203, 19991015]

約数ペア:

[(1, 19991015), (5, 3998203), (11, 1817365), (55, 363473), (121, 165215), (173, 115555), (191, 104665), (605, 33043), (865, 23111), (955, 20933), (1903, 10505), (2101, 9515)]