21013707

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 34171424

約数和(自身を除く): 13157717

約数列:

[1, 3, 11, 13, 33, 39, 61, 73, 121, 143, 183, 219, 363, 429, 671, 793, 803, 949, 1573, 2013, 2379, 2409, 2847, 4453, 4719, 7381, 8723, 8833, 10439, 13359, 22143, 26169, 26499, 31317, 48983, 57889, 95953, 114829, 146949, 173667, 287859, 344487, 538813, 636779, 1616439, 1910337, 7004569, 21013707]

約数ペア:

[(1, 21013707), (3, 7004569), (11, 1910337), (13, 1616439), (33, 636779), (39, 538813), (61, 344487), (73, 287859), (121, 173667), (143, 146949), (183, 114829), (219, 95953), (363, 57889), (429, 48983), (671, 31317), (793, 26499), (803, 26169), (949, 22143), (1573, 13359), (2013, 10439), (2379, 8833), (2409, 8723), (2847, 7381), (4453, 4719)]