17780420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{89}}^1\times {\mathrm{1427}}^1$

素因数の和:1532

約数の個数: 48

約数和(自身を含む): 43182720

約数和(自身を除く): 25402300

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 89, 140, 178, 356, 445, 623, 890, 1246, 1427, 1780, 2492, 2854, 3115, 5708, 6230, 7135, 9989, 12460, 14270, 19978, 28540, 39956, 49945, 99890, 127003, 199780, 254006, 508012, 635015, 889021, 1270030, 1778042, 2540060, 3556084, 4445105, 8890210, 17780420]

約数ペア:

[(1, 17780420), (2, 8890210), (4, 4445105), (5, 3556084), (7, 2540060), (10, 1778042), (14, 1270030), (20, 889021), (28, 635015), (35, 508012), (70, 254006), (89, 199780), (140, 127003), (178, 99890), (356, 49945), (445, 39956), (623, 28540), (890, 19978), (1246, 14270), (1427, 12460), (1780, 9989), (2492, 7135), (2854, 6230), (3115, 5708)]