20820420

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{103}}^1\times {\mathrm{1123}}^1$

素因数の和:1241

約数の個数: 72

約数和(自身を含む): 63825216

約数和(自身を除く): 43004796

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 103, 180, 206, 309, 412, 515, 618, 927, 1030, 1123, 1236, 1545, 1854, 2060, 2246, 3090, 3369, 3708, 4492, 4635, 5615, 6180, 6738, 9270, 10107, 11230, 13476, 16845, 18540, 20214, 22460, 33690, 40428, 50535, 67380, 101070, 115669, 202140, 231338, 347007, 462676, 578345, 694014, 1041021, 1156690, 1388028, 1735035, 2082042, 2313380, 3470070, 4164084, 5205105, 6940140, 10410210, 20820420]

約数ペア:

[(1, 20820420), (2, 10410210), (3, 6940140), (4, 5205105), (5, 4164084), (6, 3470070), (9, 2313380), (10, 2082042), (12, 1735035), (15, 1388028), (18, 1156690), (20, 1041021), (30, 694014), (36, 578345), (45, 462676), (60, 347007), (90, 231338), (103, 202140), (180, 115669), (206, 101070), (309, 67380), (412, 50535), (515, 40428), (618, 33690), (927, 22460), (1030, 20214), (1123, 18540), (1236, 16845), (1545, 13476), (1854, 11230), (2060, 10107), (2246, 9270), (3090, 6738), (3369, 6180), (3708, 5615), (4492, 4635)]