20667520

素因数分解:

$2^7\times 5^1\times {\mathrm{43}}^1\times {\mathrm{751}}^1$

素因数の和:813

約数の個数: 64

約数和(自身を含む): 50624640

約数和(自身を除く): 29957120

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, 751, 860, 1376, 1502, 1720, 2752, 3004, 3440, 3755, 5504, 6008, 6880, 7510, 12016, 13760, 15020, 24032, 27520, 30040, 32293, 48064, 60080, 64586, 96128, 120160, 129172, 161465, 240320, 258344, 322930, 480640, 516688, 645860, 1033376, 1291720, 2066752, 2583440, 4133504, 5166880, 10333760, 20667520]

約数ペア:

[(1, 20667520), (2, 10333760), (4, 5166880), (5, 4133504), (8, 2583440), (10, 2066752), (16, 1291720), (20, 1033376), (32, 645860), (40, 516688), (43, 480640), (64, 322930), (80, 258344), (86, 240320), (128, 161465), (160, 129172), (172, 120160), (215, 96128), (320, 64586), (344, 60080), (430, 48064), (640, 32293), (688, 30040), (751, 27520), (860, 24032), (1376, 15020), (1502, 13760), (1720, 12016), (2752, 7510), (3004, 6880), (3440, 6008), (3755, 5504)]