9991905

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{211}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 20514816

約数和(自身を除く): 10522911

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 41, 55, 77, 105, 123, 165, 205, 211, 231, 287, 385, 451, 615, 633, 861, 1055, 1155, 1353, 1435, 1477, 2255, 2321, 3157, 3165, 4305, 4431, 6765, 6963, 7385, 8651, 9471, 11605, 15785, 16247, 22155, 25953, 34815, 43255, 47355, 48741, 60557, 81235, 95161, 129765, 181671, 243705, 285483, 302785, 475805, 666127, 908355, 1427415, 1998381, 3330635, 9991905]

約数ペア:

[(1, 9991905), (3, 3330635), (5, 1998381), (7, 1427415), (11, 908355), (15, 666127), (21, 475805), (33, 302785), (35, 285483), (41, 243705), (55, 181671), (77, 129765), (105, 95161), (123, 81235), (165, 60557), (205, 48741), (211, 47355), (231, 43255), (287, 34815), (385, 25953), (451, 22155), (615, 16247), (633, 15785), (861, 11605), (1055, 9471), (1155, 8651), (1353, 7385), (1435, 6963), (1477, 6765), (2255, 4431), (2321, 4305), (3157, 3165)]