28349919

素因数分解:

$3^4\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{109}}^1$

素因数の和:166

約数の個数: 60

約数和(自身を含む): 48714600

約数和(自身を除く): 20364681

約数列:

[1, 3, 9, 13, 19, 27, 39, 57, 81, 109, 117, 169, 171, 247, 327, 351, 507, 513, 741, 981, 1053, 1417, 1521, 1539, 2071, 2223, 2943, 3211, 4251, 4563, 6213, 6669, 8829, 9633, 12753, 13689, 18421, 18639, 20007, 26923, 28899, 38259, 55263, 55917, 80769, 86697, 114777, 165789, 167751, 242307, 260091, 349999, 497367, 726921, 1049997, 1492101, 2180763, 3149991, 9449973, 28349919]

約数ペア:

[(1, 28349919), (3, 9449973), (9, 3149991), (13, 2180763), (19, 1492101), (27, 1049997), (39, 726921), (57, 497367), (81, 349999), (109, 260091), (117, 242307), (169, 167751), (171, 165789), (247, 114777), (327, 86697), (351, 80769), (507, 55917), (513, 55263), (741, 38259), (981, 28899), (1053, 26923), (1417, 20007), (1521, 18639), (1539, 18421), (2071, 13689), (2223, 12753), (2943, 9633), (3211, 8829), (4251, 6669), (4563, 6213)]