20635713

素因数分解:

$3^2\times 7^2\times {\mathrm{73}}^1\times {\mathrm{641}}^1$

素因数の和:734

約数の個数: 36

約数和(自身を含む): 35203428

約数和(自身を除く): 14567715

約数列:

[1, 3, 7, 9, 21, 49, 63, 73, 147, 219, 441, 511, 641, 657, 1533, 1923, 3577, 4487, 4599, 5769, 10731, 13461, 31409, 32193, 40383, 46793, 94227, 140379, 282681, 327551, 421137, 982653, 2292857, 2947959, 6878571, 20635713]

約数ペア:

[(1, 20635713), (3, 6878571), (7, 2947959), (9, 2292857), (21, 982653), (49, 421137), (63, 327551), (73, 282681), (147, 140379), (219, 94227), (441, 46793), (511, 40383), (641, 32193), (657, 31409), (1533, 13461), (1923, 10731), (3577, 5769), (4487, 4599)]