20207979

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{101}}^1$

素因数の和:208

約数の個数: 48

約数和(自身を含む): 33606144

約数和(自身を除く): 13398165

約数列:

[1, 3, 9, 11, 33, 43, 47, 99, 101, 129, 141, 303, 387, 423, 473, 517, 909, 1111, 1419, 1551, 2021, 3333, 4257, 4343, 4653, 4747, 6063, 9999, 13029, 14241, 18189, 22231, 39087, 42723, 47773, 52217, 66693, 143319, 156651, 200079, 204121, 429957, 469953, 612363, 1837089, 2245331, 6735993, 20207979]

約数ペア:

[(1, 20207979), (3, 6735993), (9, 2245331), (11, 1837089), (33, 612363), (43, 469953), (47, 429957), (99, 204121), (101, 200079), (129, 156651), (141, 143319), (303, 66693), (387, 52217), (423, 47773), (473, 42723), (517, 39087), (909, 22231), (1111, 18189), (1419, 14241), (1551, 13029), (2021, 9999), (3333, 6063), (4257, 4747), (4343, 4653)]