21000391643

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{229}}^1\times {\mathrm{27697}}^1$

素因数の和:27987

約数の個数: 32

約数和(自身を含む): 26909160960

約数和(自身を除く): 5908769317

約数列:

[1, 7, 11, 43, 77, 229, 301, 473, 1603, 2519, 3311, 9847, 17633, 27697, 68929, 108317, 193879, 304667, 758219, 1190971, 2132669, 6342613, 8336797, 13100681, 44398291, 69768743, 91704767, 272732359, 488381201, 1909126513, 3000055949, 21000391643]

約数ペア:

[(1, 21000391643), (7, 3000055949), (11, 1909126513), (43, 488381201), (77, 272732359), (229, 91704767), (301, 69768743), (473, 44398291), (1603, 13100681), (2519, 8336797), (3311, 6342613), (9847, 2132669), (17633, 1190971), (27697, 758219), (68929, 304667), (108317, 193879)]