21057993

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{61}}^1\times {\mathrm{317}}^1$

素因数の和:406

約数の個数: 36

約数和(自身を含む): 34088964

約数和(自身を除く): 13030971

約数列:

[1, 3, 9, 11, 33, 61, 99, 121, 183, 317, 363, 549, 671, 951, 1089, 2013, 2853, 3487, 6039, 7381, 10461, 19337, 22143, 31383, 38357, 58011, 66429, 115071, 174033, 212707, 345213, 638121, 1914363, 2339777, 7019331, 21057993]

約数ペア:

[(1, 21057993), (3, 7019331), (9, 2339777), (11, 1914363), (33, 638121), (61, 345213), (99, 212707), (121, 174033), (183, 115071), (317, 66429), (363, 58011), (549, 38357), (671, 31383), (951, 22143), (1089, 19337), (2013, 10461), (2853, 7381), (3487, 6039)]