21527919

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{151}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 37433344

約数和(自身を除く): 15905425

約数列:

[1, 3, 7, 9, 21, 31, 63, 73, 93, 151, 217, 219, 279, 453, 511, 651, 657, 1057, 1359, 1533, 1953, 2263, 3171, 4599, 4681, 6789, 9513, 11023, 14043, 15841, 20367, 32767, 33069, 42129, 47523, 77161, 98301, 99207, 142569, 231483, 294903, 341713, 694449, 1025139, 2391991, 3075417, 7175973, 21527919]

約数ペア:

[(1, 21527919), (3, 7175973), (7, 3075417), (9, 2391991), (21, 1025139), (31, 694449), (63, 341713), (73, 294903), (93, 231483), (151, 142569), (217, 99207), (219, 98301), (279, 77161), (453, 47523), (511, 42129), (651, 33069), (657, 32767), (1057, 20367), (1359, 15841), (1533, 14043), (1953, 11023), (2263, 9513), (3171, 6789), (4599, 4681)]