20945145

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{2903}}^1$

素因数の和:2961

約数の個数: 32

約数和(自身を含む): 37078272

約数和(自身を除く): 16133127

約数列:

[1, 3, 5, 13, 15, 37, 39, 65, 111, 185, 195, 481, 555, 1443, 2405, 2903, 7215, 8709, 14515, 37739, 43545, 107411, 113217, 188695, 322233, 537055, 566085, 1396343, 1611165, 4189029, 6981715, 20945145]

約数ペア:

[(1, 20945145), (3, 6981715), (5, 4189029), (13, 1611165), (15, 1396343), (37, 566085), (39, 537055), (65, 322233), (111, 188695), (185, 113217), (195, 107411), (481, 43545), (555, 37739), (1443, 14515), (2405, 8709), (2903, 7215)]