20491040

素因数分解:

$2^5\times 5^1\times {\mathrm{83}}^1\times {\mathrm{1543}}^1$

素因数の和:1641

約数の個数: 48

約数和(自身を含む): 49025088

約数和(自身を除く): 28534048

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 83, 160, 166, 332, 415, 664, 830, 1328, 1543, 1660, 2656, 3086, 3320, 6172, 6640, 7715, 12344, 13280, 15430, 24688, 30860, 49376, 61720, 123440, 128069, 246880, 256138, 512276, 640345, 1024552, 1280690, 2049104, 2561380, 4098208, 5122760, 10245520, 20491040]

約数ペア:

[(1, 20491040), (2, 10245520), (4, 5122760), (5, 4098208), (8, 2561380), (10, 2049104), (16, 1280690), (20, 1024552), (32, 640345), (40, 512276), (80, 256138), (83, 246880), (160, 128069), (166, 123440), (332, 61720), (415, 49376), (664, 30860), (830, 24688), (1328, 15430), (1543, 13280), (1660, 12344), (2656, 7715), (3086, 6640), (3320, 6172)]