28118727

素因数分解:

$3^2\times 7^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{139}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 53289600

約数和(自身を除く): 25170873

約数列:

[1, 3, 7, 9, 13, 19, 21, 39, 57, 63, 91, 117, 133, 139, 169, 171, 247, 273, 399, 417, 507, 741, 819, 973, 1183, 1197, 1251, 1521, 1729, 1807, 2223, 2641, 2919, 3211, 3549, 5187, 5421, 7923, 8757, 9633, 10647, 12649, 15561, 16263, 18487, 22477, 23491, 23769, 28899, 34333, 37947, 55461, 67431, 70473, 102999, 113841, 164437, 166383, 202293, 211419, 240331, 308997, 446329, 493311, 720993, 1338987, 1479933, 2162979, 3124303, 4016961, 9372909, 28118727]

約数ペア:

[(1, 28118727), (3, 9372909), (7, 4016961), (9, 3124303), (13, 2162979), (19, 1479933), (21, 1338987), (39, 720993), (57, 493311), (63, 446329), (91, 308997), (117, 240331), (133, 211419), (139, 202293), (169, 166383), (171, 164437), (247, 113841), (273, 102999), (399, 70473), (417, 67431), (507, 55461), (741, 37947), (819, 34333), (973, 28899), (1183, 23769), (1197, 23491), (1251, 22477), (1521, 18487), (1729, 16263), (1807, 15561), (2223, 12649), (2641, 10647), (2919, 9633), (3211, 8757), (3549, 7923), (5187, 5421)]