18220671

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{9973}}^1$

素因数の和:10015

約数の個数: 24

約数和(自身を含む): 31118880

約数和(自身を除く): 12898209

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 9973, 29919, 69811, 89757, 209433, 289217, 628299, 867651, 2024519, 2602953, 6073557, 18220671]

約数ペア:

[(1, 18220671), (3, 6073557), (7, 2602953), (9, 2024519), (21, 867651), (29, 628299), (63, 289217), (87, 209433), (203, 89757), (261, 69811), (609, 29919), (1827, 9973)]