21270405

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{5741}}^1$

素因数の和:5781

約数の個数: 32

約数和(自身を含む): 38586240

約数和(自身を除く): 17315835

約数列:

[1, 3, 5, 13, 15, 19, 39, 57, 65, 95, 195, 247, 285, 741, 1235, 3705, 5741, 17223, 28705, 74633, 86115, 109079, 223899, 327237, 373165, 545395, 1119495, 1418027, 1636185, 4254081, 7090135, 21270405]

約数ペア:

[(1, 21270405), (3, 7090135), (5, 4254081), (13, 1636185), (15, 1418027), (19, 1119495), (39, 545395), (57, 373165), (65, 327237), (95, 223899), (195, 109079), (247, 86115), (285, 74633), (741, 28705), (1235, 17223), (3705, 5741)]