19721666

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:374

約数の個数: 32

約数和(自身を含む): 32823792

約数和(自身を除く): 13102126

約数列:

[1, 2, 17, 34, 37, 61, 74, 122, 257, 514, 629, 1037, 1258, 2074, 2257, 4369, 4514, 8738, 9509, 15677, 19018, 31354, 38369, 76738, 161653, 266509, 323306, 533018, 580049, 1160098, 9860833, 19721666]

約数ペア:

[(1, 19721666), (2, 9860833), (17, 1160098), (34, 580049), (37, 533018), (61, 323306), (74, 266509), (122, 161653), (257, 76738), (514, 38369), (629, 31354), (1037, 19018), (1258, 15677), (2074, 9509), (2257, 8738), (4369, 4514)]