19840737

素因数分解:

$3^1\times 7^2\times {\mathrm{71}}^1\times {\mathrm{1901}}^1$

素因数の和:1989

約数の個数: 24

約数和(自身を含む): 31223232

約数和(自身を除く): 11382495

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 497, 1491, 1901, 3479, 5703, 10437, 13307, 39921, 93149, 134971, 279447, 404913, 944797, 2834391, 6613579, 19840737]

約数ペア:

[(1, 19840737), (3, 6613579), (7, 2834391), (21, 944797), (49, 404913), (71, 279447), (147, 134971), (213, 93149), (497, 39921), (1491, 13307), (1901, 10437), (3479, 5703)]