21218072

素因数分解:

$2^3\times {\mathrm{139}}^1\times {\mathrm{19081}}^1$

素因数の和:19226

約数の個数: 16

約数和(自身を含む): 40072200

約数和(自身を除く): 18854128

約数列:

[1, 2, 4, 8, 139, 278, 556, 1112, 19081, 38162, 76324, 152648, 2652259, 5304518, 10609036, 21218072]

約数ペア:

[(1, 21218072), (2, 10609036), (4, 5304518), (8, 2652259), (139, 152648), (278, 76324), (556, 38162), (1112, 19081)]