21233121

素因数分解:

$3^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{271}}^1$

素因数の和:342

約数の個数: 48

約数和(自身を含む): 36465408

約数和(自身を除く): 15232287

約数列:

[1, 3, 7, 13, 21, 39, 41, 49, 91, 123, 147, 271, 273, 287, 533, 637, 813, 861, 1599, 1897, 1911, 2009, 3523, 3731, 5691, 6027, 10569, 11111, 11193, 13279, 24661, 26117, 33333, 39837, 73983, 77777, 78351, 144443, 172627, 233331, 433329, 517881, 544439, 1011101, 1633317, 3033303, 7077707, 21233121]

約数ペア:

[(1, 21233121), (3, 7077707), (7, 3033303), (13, 1633317), (21, 1011101), (39, 544439), (41, 517881), (49, 433329), (91, 233331), (123, 172627), (147, 144443), (271, 78351), (273, 77777), (287, 73983), (533, 39837), (637, 33333), (813, 26117), (861, 24661), (1599, 13279), (1897, 11193), (1911, 11111), (2009, 10569), (3523, 6027), (3731, 5691)]