20408817

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1\times {\mathrm{421}}^1$

素因数の和:561

約数の個数: 32

約数和(自身を含む): 32328576

約数和(自身を除く): 11919759

約数列:

[1, 3, 11, 13, 33, 39, 113, 143, 339, 421, 429, 1243, 1263, 1469, 3729, 4407, 4631, 5473, 13893, 16159, 16419, 47573, 48477, 60203, 142719, 180609, 523303, 618449, 1569909, 1855347, 6802939, 20408817]

約数ペア:

[(1, 20408817), (3, 6802939), (11, 1855347), (13, 1569909), (33, 618449), (39, 523303), (113, 180609), (143, 142719), (339, 60203), (421, 48477), (429, 47573), (1243, 16419), (1263, 16159), (1469, 13893), (3729, 5473), (4407, 4631)]