20780067

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1$

素因数の和:280

約数の個数: 48

約数和(自身を含む): 35852544

約数和(自身を除く): 15072477

約数列:

[1, 3, 7, 11, 21, 33, 49, 71, 77, 147, 181, 213, 231, 497, 539, 543, 781, 1267, 1491, 1617, 1991, 2343, 3479, 3801, 5467, 5973, 8869, 10437, 12851, 13937, 16401, 26607, 38269, 38553, 41811, 89957, 97559, 114807, 141361, 269871, 292677, 424083, 629699, 989527, 1889097, 2968581, 6926689, 20780067]

約数ペア:

[(1, 20780067), (3, 6926689), (7, 2968581), (11, 1889097), (21, 989527), (33, 629699), (49, 424083), (71, 292677), (77, 269871), (147, 141361), (181, 114807), (213, 97559), (231, 89957), (497, 41811), (539, 38553), (543, 38269), (781, 26607), (1267, 16401), (1491, 13937), (1617, 12851), (1991, 10437), (2343, 8869), (3479, 5973), (3801, 5467)]