21531003

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{347}}^1$

素因数の和:443

約数の個数: 32

約数和(自身を含む): 32583936

約数和(自身を除く): 11052933

約数列:

[1, 3, 13, 37, 39, 43, 111, 129, 347, 481, 559, 1041, 1443, 1591, 1677, 4511, 4773, 12839, 13533, 14921, 20683, 38517, 44763, 62049, 166907, 193973, 500721, 552077, 581919, 1656231, 7177001, 21531003]

約数ペア:

[(1, 21531003), (3, 7177001), (13, 1656231), (37, 581919), (39, 552077), (43, 500721), (111, 193973), (129, 166907), (347, 62049), (481, 44763), (559, 38517), (1041, 20683), (1443, 14921), (1591, 13533), (1677, 12839), (4511, 4773)]