19718751

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{89}}^1$

素因数の和:160

約数の個数: 48

約数和(自身を含む): 31622400

約数和(自身を除く): 11903649

約数列:

[1, 3, 13, 19, 23, 39, 57, 69, 89, 169, 247, 267, 299, 437, 507, 741, 897, 1157, 1311, 1691, 2047, 3211, 3471, 3887, 5073, 5681, 6141, 9633, 11661, 15041, 17043, 21983, 26611, 38893, 45123, 65949, 73853, 79833, 116679, 221559, 285779, 345943, 505609, 857337, 1037829, 1516827, 6572917, 19718751]

約数ペア:

[(1, 19718751), (3, 6572917), (13, 1516827), (19, 1037829), (23, 857337), (39, 505609), (57, 345943), (69, 285779), (89, 221559), (169, 116679), (247, 79833), (267, 73853), (299, 65949), (437, 45123), (507, 38893), (741, 26611), (897, 21983), (1157, 17043), (1311, 15041), (1691, 11661), (2047, 9633), (3211, 6141), (3471, 5681), (3887, 5073)]