21945209

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{197}}^1$

素因数の和:281

約数の個数: 32

約数和(自身を含む): 27941760

約数和(自身を除く): 5996551

約数列:

[1, 11, 13, 19, 41, 143, 197, 209, 247, 451, 533, 779, 2167, 2561, 2717, 3743, 5863, 8077, 8569, 10127, 28171, 41173, 48659, 88847, 105001, 111397, 153463, 535249, 1155011, 1688093, 1995019, 21945209]

約数ペア:

[(1, 21945209), (11, 1995019), (13, 1688093), (19, 1155011), (41, 535249), (143, 153463), (197, 111397), (209, 105001), (247, 88847), (451, 48659), (533, 41173), (779, 28171), (2167, 10127), (2561, 8569), (2717, 8077), (3743, 5863)]