21967075

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{263}}^1$

素因数の和:543

約数の個数: 24

約数和(自身を含む): 29560608

約数和(自身を除く): 7593533

約数列:

[1, 5, 13, 25, 65, 257, 263, 325, 1285, 1315, 3341, 3419, 6425, 6575, 16705, 17095, 67591, 83525, 85475, 337955, 878683, 1689775, 4393415, 21967075]

約数ペア:

[(1, 21967075), (5, 4393415), (13, 1689775), (25, 878683), (65, 337955), (257, 85475), (263, 83525), (325, 67591), (1285, 17095), (1315, 16705), (3341, 6575), (3419, 6425)]