19798989

素因数分解:

$3^1\times 7^3\times {\mathrm{71}}^1\times {\mathrm{271}}^1$

素因数の和:366

約数の個数: 32

約数和(自身を含む): 31334400

約数和(自身を除く): 11535411

約数列:

[1, 3, 7, 21, 49, 71, 147, 213, 271, 343, 497, 813, 1029, 1491, 1897, 3479, 5691, 10437, 13279, 19241, 24353, 39837, 57723, 73059, 92953, 134687, 278859, 404061, 942809, 2828427, 6599663, 19798989]

約数ペア:

[(1, 19798989), (3, 6599663), (7, 2828427), (21, 942809), (49, 404061), (71, 278859), (147, 134687), (213, 92953), (271, 73059), (343, 57723), (497, 39837), (813, 24353), (1029, 19241), (1491, 13279), (1897, 10437), (3479, 5691)]