21065121

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{113}}^1\times {\mathrm{269}}^1$

素因数の和:406

約数の個数: 48

約数和(自身を含む): 38413440

約数和(自身を除く): 17348319

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 113, 231, 269, 339, 693, 791, 807, 1017, 1243, 1883, 2373, 2421, 2959, 3729, 5649, 7119, 8701, 8877, 11187, 16947, 20713, 26103, 26631, 30397, 62139, 78309, 91191, 186417, 212779, 273573, 334367, 638337, 1003101, 1915011, 2340569, 3009303, 7021707, 21065121]

約数ペア:

[(1, 21065121), (3, 7021707), (7, 3009303), (9, 2340569), (11, 1915011), (21, 1003101), (33, 638337), (63, 334367), (77, 273573), (99, 212779), (113, 186417), (231, 91191), (269, 78309), (339, 62139), (693, 30397), (791, 26631), (807, 26103), (1017, 20713), (1243, 16947), (1883, 11187), (2373, 8877), (2421, 8701), (2959, 7119), (3729, 5649)]