21018171

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1\times {\mathrm{1567}}^1$

素因数の和:1850

約数の個数: 16

約数和(自身を含む): 29804544

約数和(自身を除く): 8786373

約数列:

[1, 3, 17, 51, 263, 789, 1567, 4471, 4701, 13413, 26639, 79917, 412121, 1236363, 7006057, 21018171]

約数ペア:

[(1, 21018171), (3, 7006057), (17, 1236363), (51, 412121), (263, 79917), (789, 26639), (1567, 13413), (4471, 4701)]