21630777

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{223}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 34406400

約数和(自身を除く): 12775623

約数列:

[1, 3, 7, 21, 31, 93, 149, 217, 223, 447, 651, 669, 1043, 1561, 3129, 4619, 4683, 6913, 13857, 20739, 32333, 33227, 48391, 96999, 99681, 145173, 232589, 697767, 1030037, 3090111, 7210259, 21630777]

約数ペア:

[(1, 21630777), (3, 7210259), (7, 3090111), (21, 1030037), (31, 697767), (93, 232589), (149, 145173), (217, 99681), (223, 96999), (447, 48391), (651, 33227), (669, 32333), (1043, 20739), (1561, 13857), (3129, 6913), (4619, 4683)]