21221110

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{21011}}^1$

素因数の和:21119

約数の個数: 16

約数和(自身を含む): 38578032

約数和(自身を除く): 17356922

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 21011, 42022, 105055, 210110, 2122111, 4244222, 10610555, 21221110]

約数ペア:

[(1, 21221110), (2, 10610555), (5, 4244222), (10, 2122111), (101, 210110), (202, 105055), (505, 42022), (1010, 21011)]