19721547

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{1553}}^1$

素因数の和:1659

約数の個数: 24

約数和(自身を含む): 30545424

約数和(自身を除く): 10823877

約数列:

[1, 3, 9, 17, 51, 83, 153, 249, 747, 1411, 1553, 4233, 4659, 12699, 13977, 26401, 79203, 128899, 237609, 386697, 1160091, 2191283, 6573849, 19721547]

約数ペア:

[(1, 19721547), (3, 6573849), (9, 2191283), (17, 1160091), (51, 386697), (83, 237609), (153, 128899), (249, 79203), (747, 26401), (1411, 13977), (1553, 12699), (4233, 4659)]