20405925

素因数分解:

$3^5\times 5^2\times {\mathrm{3359}}^1$

素因数の和:3384

約数の個数: 36

約数和(自身を含む): 37914240

約数和(自身を除く): 17508315

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 81, 135, 225, 243, 405, 675, 1215, 2025, 3359, 6075, 10077, 16795, 30231, 50385, 83975, 90693, 151155, 251925, 272079, 453465, 755775, 816237, 1360395, 2267325, 4081185, 6801975, 20405925]

約数ペア:

[(1, 20405925), (3, 6801975), (5, 4081185), (9, 2267325), (15, 1360395), (25, 816237), (27, 755775), (45, 453465), (75, 272079), (81, 251925), (135, 151155), (225, 90693), (243, 83975), (405, 50385), (675, 30231), (1215, 16795), (2025, 10077), (3359, 6075)]