21164385

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{157}}^1$

素因数の和:238

約数の個数: 64

約数和(自身を含む): 40043520

約数和(自身を除く): 18879135

約数列:

[1, 3, 5, 11, 15, 19, 33, 43, 55, 57, 95, 129, 157, 165, 209, 215, 285, 471, 473, 627, 645, 785, 817, 1045, 1419, 1727, 2355, 2365, 2451, 2983, 3135, 4085, 5181, 6751, 7095, 8635, 8949, 8987, 12255, 14915, 20253, 25905, 26961, 32813, 33755, 44745, 44935, 74261, 98439, 101265, 128269, 134805, 164065, 222783, 371305, 384807, 492195, 641345, 1113915, 1410959, 1924035, 4232877, 7054795, 21164385]

約数ペア:

[(1, 21164385), (3, 7054795), (5, 4232877), (11, 1924035), (15, 1410959), (19, 1113915), (33, 641345), (43, 492195), (55, 384807), (57, 371305), (95, 222783), (129, 164065), (157, 134805), (165, 128269), (209, 101265), (215, 98439), (285, 74261), (471, 44935), (473, 44745), (627, 33755), (645, 32813), (785, 26961), (817, 25905), (1045, 20253), (1419, 14915), (1727, 12255), (2355, 8987), (2365, 8949), (2451, 8635), (2983, 7095), (3135, 6751), (4085, 5181)]