21209870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{192817}}^1$

素因数の和:192835

約数の個数: 16

約数和(自身を含む): 41648688

約数和(自身を除く): 20438818

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 192817, 385634, 964085, 1928170, 2120987, 4241974, 10604935, 21209870]

約数ペア:

[(1, 21209870), (2, 10604935), (5, 4241974), (10, 2120987), (11, 1928170), (22, 964085), (55, 385634), (110, 192817)]