21042747

素因数分解:

$3^4\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{113}}^1$

素因数の和:166

約数の個数: 60

約数和(自身を含む): 36692040

約数和(自身を除く): 15649293

約数列:

[1, 3, 9, 11, 19, 27, 33, 57, 81, 99, 113, 121, 171, 209, 297, 339, 363, 513, 627, 891, 1017, 1089, 1243, 1539, 1881, 2147, 2299, 3051, 3267, 3729, 5643, 6441, 6897, 9153, 9801, 11187, 13673, 16929, 19323, 20691, 23617, 33561, 41019, 57969, 62073, 70851, 100683, 123057, 173907, 186219, 212553, 259787, 369171, 637659, 779361, 1107513, 1912977, 2338083, 7014249, 21042747]

約数ペア:

[(1, 21042747), (3, 7014249), (9, 2338083), (11, 1912977), (19, 1107513), (27, 779361), (33, 637659), (57, 369171), (81, 259787), (99, 212553), (113, 186219), (121, 173907), (171, 123057), (209, 100683), (297, 70851), (339, 62073), (363, 57969), (513, 41019), (627, 33561), (891, 23617), (1017, 20691), (1089, 19323), (1243, 16929), (1539, 13673), (1881, 11187), (2147, 9801), (2299, 9153), (3051, 6897), (3267, 6441), (3729, 5643)]