20420337

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{641}}^1$

素因数の和:729

約数の個数: 32

約数和(自身を含む): 32788224

約数和(自身を除く): 12367887

約数列:

[1, 3, 7, 21, 37, 41, 111, 123, 259, 287, 641, 777, 861, 1517, 1923, 4487, 4551, 10619, 13461, 23717, 26281, 31857, 71151, 78843, 166019, 183967, 498057, 551901, 972397, 2917191, 6806779, 20420337]

約数ペア:

[(1, 20420337), (3, 6806779), (7, 2917191), (21, 972397), (37, 551901), (41, 498057), (111, 183967), (123, 166019), (259, 78843), (287, 71151), (641, 31857), (777, 26281), (861, 23717), (1517, 13461), (1923, 10619), (4487, 4551)]