18436938

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{239}}^1$

素因数の和:323

約数の個数: 64

約数和(自身を含む): 42577920

約数和(自身を除く): 24140982

約数列:

[1, 2, 3, 6, 13, 23, 26, 39, 43, 46, 69, 78, 86, 129, 138, 239, 258, 299, 478, 559, 598, 717, 897, 989, 1118, 1434, 1677, 1794, 1978, 2967, 3107, 3354, 5497, 5934, 6214, 9321, 10277, 10994, 12857, 16491, 18642, 20554, 25714, 30831, 32982, 38571, 61662, 71461, 77142, 133601, 142922, 214383, 236371, 267202, 400803, 428766, 472742, 709113, 801606, 1418226, 3072823, 6145646, 9218469, 18436938]

約数ペア:

[(1, 18436938), (2, 9218469), (3, 6145646), (6, 3072823), (13, 1418226), (23, 801606), (26, 709113), (39, 472742), (43, 428766), (46, 400803), (69, 267202), (78, 236371), (86, 214383), (129, 142922), (138, 133601), (239, 77142), (258, 71461), (299, 61662), (478, 38571), (559, 32982), (598, 30831), (717, 25714), (897, 20554), (989, 18642), (1118, 16491), (1434, 12857), (1677, 10994), (1794, 10277), (1978, 9321), (2967, 6214), (3107, 5934), (3354, 5497)]