20656881

素因数分解:

$3^2\times 7^2\times {\mathrm{31}}^1\times {\mathrm{1511}}^1$

素因数の和:1562

約数の個数: 36

約数和(自身を含む): 35852544

約数和(自身を除く): 15195663

約数列:

[1, 3, 7, 9, 21, 31, 49, 63, 93, 147, 217, 279, 441, 651, 1511, 1519, 1953, 4533, 4557, 10577, 13599, 13671, 31731, 46841, 74039, 95193, 140523, 222117, 327887, 421569, 666351, 983661, 2295209, 2950983, 6885627, 20656881]

約数ペア:

[(1, 20656881), (3, 6885627), (7, 2950983), (9, 2295209), (21, 983661), (31, 666351), (49, 421569), (63, 327887), (93, 222117), (147, 140523), (217, 95193), (279, 74039), (441, 46841), (651, 31731), (1511, 13671), (1519, 13599), (1953, 10577), (4533, 4557)]