21505965

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{3803}}^1$

素因数の和:3853

約数の個数: 32

約数和(自身を含む): 38344320

約数和(自身を除く): 16838355

約数列:

[1, 3, 5, 13, 15, 29, 39, 65, 87, 145, 195, 377, 435, 1131, 1885, 3803, 5655, 11409, 19015, 49439, 57045, 110287, 148317, 247195, 330861, 551435, 741585, 1433731, 1654305, 4301193, 7168655, 21505965]

約数ペア:

[(1, 21505965), (3, 7168655), (5, 4301193), (13, 1654305), (15, 1433731), (29, 741585), (39, 551435), (65, 330861), (87, 247195), (145, 148317), (195, 110287), (377, 57045), (435, 49439), (1131, 19015), (1885, 11409), (3803, 5655)]