661815

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{191}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 1437696

約数和(自身を除く): 775881

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 45, 55, 63, 77, 99, 105, 165, 191, 231, 315, 385, 495, 573, 693, 955, 1155, 1337, 1719, 2101, 2865, 3465, 4011, 6303, 6685, 8595, 10505, 12033, 14707, 18909, 20055, 31515, 44121, 60165, 73535, 94545, 132363, 220605, 661815]

約数ペア:

[(1, 661815), (3, 220605), (5, 132363), (7, 94545), (9, 73535), (11, 60165), (15, 44121), (21, 31515), (33, 20055), (35, 18909), (45, 14707), (55, 12033), (63, 10505), (77, 8595), (99, 6685), (105, 6303), (165, 4011), (191, 3465), (231, 2865), (315, 2101), (385, 1719), (495, 1337), (573, 1155), (693, 955)]