20761990

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{641}}^1$

素因数の和:768

約数の個数: 32

約数和(自身を含む): 38828160

約数和(自身を除く): 18066170

約数列:

[1, 2, 5, 10, 41, 79, 82, 158, 205, 395, 410, 641, 790, 1282, 3205, 3239, 6410, 6478, 16195, 26281, 32390, 50639, 52562, 101278, 131405, 253195, 262810, 506390, 2076199, 4152398, 10380995, 20761990]

約数ペア:

[(1, 20761990), (2, 10380995), (5, 4152398), (10, 2076199), (41, 506390), (79, 262810), (82, 253195), (158, 131405), (205, 101278), (395, 52562), (410, 50639), (641, 32390), (790, 26281), (1282, 16195), (3205, 6478), (3239, 6410)]