21073013

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:197

約数の個数: 24

約数和(自身を含む): 24756480

約数和(自身を除く): 3683467

約数列:

[1, 13, 17, 71, 79, 221, 289, 923, 1027, 1207, 1343, 3757, 5609, 15691, 17459, 20519, 22831, 72917, 95353, 266747, 296803, 1239589, 1621001, 21073013]

約数ペア:

[(1, 21073013), (13, 1621001), (17, 1239589), (71, 296803), (79, 266747), (221, 95353), (289, 72917), (923, 22831), (1027, 20519), (1207, 17459), (1343, 15691), (3757, 5609)]