21402949

素因数分解:

${\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1$

素因数の和:169

約数の個数: 32

約数和(自身を含む): 25850880

約数和(自身を除く): 4447931

約数列:

[1, 17, 19, 23, 43, 67, 323, 391, 437, 731, 817, 989, 1139, 1273, 1541, 2881, 7429, 13889, 16813, 18791, 21641, 26197, 29279, 48977, 54739, 66263, 319447, 497743, 930563, 1126471, 1258997, 21402949]

約数ペア:

[(1, 21402949), (17, 1258997), (19, 1126471), (23, 930563), (43, 497743), (67, 319447), (323, 66263), (391, 54739), (437, 48977), (731, 29279), (817, 26197), (989, 21641), (1139, 18791), (1273, 16813), (1541, 13889), (2881, 7429)]