21570297

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:158

約数の個数: 64

約数和(自身を含む): 37822464

約数和(自身を除く): 16252167

約数列:

[1, 3, 7, 17, 21, 23, 37, 51, 69, 71, 111, 119, 161, 213, 259, 357, 391, 483, 497, 629, 777, 851, 1173, 1207, 1491, 1633, 1887, 2553, 2627, 2737, 3621, 4403, 4899, 5957, 7881, 8211, 8449, 11431, 13209, 14467, 17871, 18389, 25347, 27761, 34293, 43401, 44659, 55167, 60421, 83283, 101269, 133977, 181263, 194327, 303807, 312613, 422947, 582981, 937839, 1027157, 1268841, 3081471, 7190099, 21570297]

約数ペア:

[(1, 21570297), (3, 7190099), (7, 3081471), (17, 1268841), (21, 1027157), (23, 937839), (37, 582981), (51, 422947), (69, 312613), (71, 303807), (111, 194327), (119, 181263), (161, 133977), (213, 101269), (259, 83283), (357, 60421), (391, 55167), (483, 44659), (497, 43401), (629, 34293), (777, 27761), (851, 25347), (1173, 18389), (1207, 17871), (1491, 14467), (1633, 13209), (1887, 11431), (2553, 8449), (2627, 8211), (2737, 7881), (3621, 5957), (4403, 4899)]