21501008

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{661}}^1$

素因数の和:795

約数の個数: 40

約数和(自身を含む): 44327520

約数和(自身を除く): 22826512

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 107, 152, 214, 304, 428, 661, 856, 1322, 1712, 2033, 2644, 4066, 5288, 8132, 10576, 12559, 16264, 25118, 32528, 50236, 70727, 100472, 141454, 200944, 282908, 565816, 1131632, 1343813, 2687626, 5375252, 10750504, 21501008]

約数ペア:

[(1, 21501008), (2, 10750504), (4, 5375252), (8, 2687626), (16, 1343813), (19, 1131632), (38, 565816), (76, 282908), (107, 200944), (152, 141454), (214, 100472), (304, 70727), (428, 50236), (661, 32528), (856, 25118), (1322, 16264), (1712, 12559), (2033, 10576), (2644, 8132), (4066, 5288)]