18995769

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{181}}^1$

素因数の和:239

約数の個数: 48

約数和(自身を含む): 31973760

約数和(自身を除く): 12977991

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 117, 169, 181, 207, 299, 351, 507, 543, 621, 897, 1521, 1629, 2353, 2691, 3887, 4163, 4563, 4887, 7059, 8073, 11661, 12489, 21177, 30589, 34983, 37467, 54119, 63531, 91767, 104949, 112401, 162357, 275301, 487071, 703547, 825903, 1461213, 2110641, 6331923, 18995769]

約数ペア:

[(1, 18995769), (3, 6331923), (9, 2110641), (13, 1461213), (23, 825903), (27, 703547), (39, 487071), (69, 275301), (117, 162357), (169, 112401), (181, 104949), (207, 91767), (299, 63531), (351, 54119), (507, 37467), (543, 34983), (621, 30589), (897, 21177), (1521, 12489), (1629, 11661), (2353, 8073), (2691, 7059), (3887, 4887), (4163, 4563)]