21787227

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{211}}^1$

素因数の和:384

約数の個数: 48

約数和(自身を含む): 39686400

約数和(自身を除く): 17899173

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 149, 211, 231, 447, 633, 693, 1043, 1341, 1477, 1639, 1899, 2321, 3129, 4431, 4917, 6963, 9387, 11473, 13293, 14751, 16247, 20889, 31439, 34419, 48741, 94317, 103257, 146223, 220073, 282951, 345829, 660219, 1037487, 1980657, 2420803, 3112461, 7262409, 21787227]

約数ペア:

[(1, 21787227), (3, 7262409), (7, 3112461), (9, 2420803), (11, 1980657), (21, 1037487), (33, 660219), (63, 345829), (77, 282951), (99, 220073), (149, 146223), (211, 103257), (231, 94317), (447, 48741), (633, 34419), (693, 31439), (1043, 20889), (1341, 16247), (1477, 14751), (1639, 13293), (1899, 11473), (2321, 9387), (3129, 6963), (4431, 4917)]