19993743

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{163}}^1$

素因数の和:249

約数の個数: 64

約数和(自身を含む): 37785600

約数和(自身を除く): 17791857

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 59, 63, 77, 99, 163, 177, 189, 231, 297, 413, 489, 531, 649, 693, 1141, 1239, 1467, 1593, 1793, 1947, 2079, 3423, 3717, 4401, 4543, 5379, 5841, 9617, 10269, 11151, 12551, 13629, 16137, 17523, 28851, 30807, 37653, 40887, 48411, 67319, 86553, 105787, 112959, 122661, 201957, 259659, 317361, 338877, 605871, 740509, 952083, 1817613, 2221527, 2856249, 6664581, 19993743]

約数ペア:

[(1, 19993743), (3, 6664581), (7, 2856249), (9, 2221527), (11, 1817613), (21, 952083), (27, 740509), (33, 605871), (59, 338877), (63, 317361), (77, 259659), (99, 201957), (163, 122661), (177, 112959), (189, 105787), (231, 86553), (297, 67319), (413, 48411), (489, 40887), (531, 37653), (649, 30807), (693, 28851), (1141, 17523), (1239, 16137), (1467, 13629), (1593, 12551), (1793, 11151), (1947, 10269), (2079, 9617), (3423, 5841), (3717, 5379), (4401, 4543)]