21105812

素因数分解:

$2^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{2521}}^1$

素因数の和:2568

約数の個数: 48

約数和(自身を含む): 47453952

約数和(自身を除く): 26348140

約数列:

[1, 2, 4, 7, 13, 14, 23, 26, 28, 46, 52, 91, 92, 161, 182, 299, 322, 364, 598, 644, 1196, 2093, 2521, 4186, 5042, 8372, 10084, 17647, 32773, 35294, 57983, 65546, 70588, 115966, 131092, 229411, 231932, 405881, 458822, 753779, 811762, 917644, 1507558, 1623524, 3015116, 5276453, 10552906, 21105812]

約数ペア:

[(1, 21105812), (2, 10552906), (4, 5276453), (7, 3015116), (13, 1623524), (14, 1507558), (23, 917644), (26, 811762), (28, 753779), (46, 458822), (52, 405881), (91, 231932), (92, 229411), (161, 131092), (182, 115966), (299, 70588), (322, 65546), (364, 57983), (598, 35294), (644, 32773), (1196, 17647), (2093, 10084), (2521, 8372), (4186, 5042)]