21861116

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{18911}}^1$

素因数の和:18949

約数の個数: 18

約数和(自身を含む): 40641888

約数和(自身を除く): 18780772

約数列:

[1, 2, 4, 17, 34, 68, 289, 578, 1156, 18911, 37822, 75644, 321487, 642974, 1285948, 5465279, 10930558, 21861116]

約数ペア:

[(1, 21861116), (2, 10930558), (4, 5465279), (17, 1285948), (34, 642974), (68, 321487), (289, 75644), (578, 37822), (1156, 18911)]