21523989

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{7963}}^1$

素因数の和:8036

約数の個数: 16

約数和(自身を含む): 30964032

約数和(自身を除く): 9440043

約数列:

[1, 3, 17, 51, 53, 159, 901, 2703, 7963, 23889, 135371, 406113, 422039, 1266117, 7174663, 21523989]

約数ペア:

[(1, 21523989), (3, 7174663), (17, 1266117), (51, 422039), (53, 406113), (159, 135371), (901, 23889), (2703, 7963)]