21211010

素因数分解:

$2^1\times 5^1\times {\mathrm{101}}^1\times {\mathrm{21001}}^1$

素因数の和:21109

約数の個数: 16

約数和(自身を含む): 38559672

約数和(自身を除く): 17348662

約数列:

[1, 2, 5, 10, 101, 202, 505, 1010, 21001, 42002, 105005, 210010, 2121101, 4242202, 10605505, 21211010]

約数ペア:

[(1, 21211010), (2, 10605505), (5, 4242202), (10, 2121101), (101, 210010), (202, 105005), (505, 42002), (1010, 21001)]