1291720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{751}}^1$

素因数の和:805

約数の個数: 32

約数和(自身を含む): 2977920

約数和(自身を除く): 1686200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 751, 860, 1502, 1720, 3004, 3755, 6008, 7510, 15020, 30040, 32293, 64586, 129172, 161465, 258344, 322930, 645860, 1291720]

約数ペア:

[(1, 1291720), (2, 645860), (4, 322930), (5, 258344), (8, 161465), (10, 129172), (20, 64586), (40, 32293), (43, 30040), (86, 15020), (172, 7510), (215, 6008), (344, 3755), (430, 3004), (751, 1720), (860, 1502)]