19992609

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:211

約数の個数: 64

約数和(自身を含む): 37273600

約数和(自身を除く): 17280991

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 79, 91, 103, 117, 189, 237, 273, 309, 351, 553, 711, 721, 819, 927, 1027, 1339, 1659, 2133, 2163, 2457, 2781, 3081, 4017, 4977, 6489, 7189, 8137, 9243, 9373, 12051, 14931, 19467, 21567, 24411, 27729, 28119, 36153, 56959, 64701, 73233, 84357, 105781, 170877, 194103, 219699, 253071, 317343, 512631, 740467, 952029, 1537893, 2221401, 2856087, 6664203, 19992609]

約数ペア:

[(1, 19992609), (3, 6664203), (7, 2856087), (9, 2221401), (13, 1537893), (21, 952029), (27, 740467), (39, 512631), (63, 317343), (79, 253071), (91, 219699), (103, 194103), (117, 170877), (189, 105781), (237, 84357), (273, 73233), (309, 64701), (351, 56959), (553, 36153), (711, 28119), (721, 27729), (819, 24411), (927, 21567), (1027, 19467), (1339, 14931), (1659, 12051), (2133, 9373), (2163, 9243), (2457, 8137), (2781, 7189), (3081, 6489), (4017, 4977)]