20821437

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{25423}}^1$

素因数の和:25449

約数の個数: 24

約数和(自身を含む): 37017344

約数和(自身を除く): 16195907

約数列:

[1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819, 25423, 76269, 177961, 228807, 330499, 533883, 991497, 1601649, 2313493, 2974491, 6940479, 20821437]

約数ペア:

[(1, 20821437), (3, 6940479), (7, 2974491), (9, 2313493), (13, 1601649), (21, 991497), (39, 533883), (63, 330499), (91, 228807), (117, 177961), (273, 76269), (819, 25423)]