18739917

素因数分解:

$3^5\times 7^1\times {\mathrm{23}}^1\times {\mathrm{479}}^1$

素因数の和:524

約数の個数: 48

約数和(自身を含む): 33546240

約数和(自身を除く): 14806323

約数列:

[1, 3, 7, 9, 21, 23, 27, 63, 69, 81, 161, 189, 207, 243, 479, 483, 567, 621, 1437, 1449, 1701, 1863, 3353, 4311, 4347, 5589, 10059, 11017, 12933, 13041, 30177, 33051, 38799, 39123, 77119, 90531, 99153, 116397, 231357, 271593, 297459, 694071, 814779, 892377, 2082213, 2677131, 6246639, 18739917]

約数ペア:

[(1, 18739917), (3, 6246639), (7, 2677131), (9, 2082213), (21, 892377), (23, 814779), (27, 694071), (63, 297459), (69, 271593), (81, 231357), (161, 116397), (189, 99153), (207, 90531), (243, 77119), (479, 39123), (483, 38799), (567, 33051), (621, 30177), (1437, 13041), (1449, 12933), (1701, 11017), (1863, 10059), (3353, 5589), (4311, 4347)]