21815157

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{1949}}^1$

素因数の和:2013

約数の個数: 32

約数和(自身を含む): 36691200

約数和(自身を除く): 14876043

約数列:

[1, 3, 7, 13, 21, 39, 41, 91, 123, 273, 287, 533, 861, 1599, 1949, 3731, 5847, 11193, 13643, 25337, 40929, 76011, 79909, 177359, 239727, 532077, 559363, 1038817, 1678089, 3116451, 7271719, 21815157]

約数ペア:

[(1, 21815157), (3, 7271719), (7, 3116451), (13, 1678089), (21, 1038817), (39, 559363), (41, 532077), (91, 239727), (123, 177359), (273, 79909), (287, 76011), (533, 40929), (861, 25337), (1599, 13643), (1949, 11193), (3731, 5847)]