20942720

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{761}}^1$

素因数の和:823

約数の個数: 64

約数和(自身を含む): 51297840

約数和(自身を除く): 30355120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 43, 64, 80, 86, 128, 160, 172, 215, 320, 344, 430, 640, 688, 761, 860, 1376, 1522, 1720, 2752, 3044, 3440, 3805, 5504, 6088, 6880, 7610, 12176, 13760, 15220, 24352, 27520, 30440, 32723, 48704, 60880, 65446, 97408, 121760, 130892, 163615, 243520, 261784, 327230, 487040, 523568, 654460, 1047136, 1308920, 2094272, 2617840, 4188544, 5235680, 10471360, 20942720]

約数ペア:

[(1, 20942720), (2, 10471360), (4, 5235680), (5, 4188544), (8, 2617840), (10, 2094272), (16, 1308920), (20, 1047136), (32, 654460), (40, 523568), (43, 487040), (64, 327230), (80, 261784), (86, 243520), (128, 163615), (160, 130892), (172, 121760), (215, 97408), (320, 65446), (344, 60880), (430, 48704), (640, 32723), (688, 30440), (761, 27520), (860, 24352), (1376, 15220), (1522, 13760), (1720, 12176), (2752, 7610), (3044, 6880), (3440, 6088), (3805, 5504)]