19971861

素因数分解:

$3^1\times 7^3\times {\mathrm{13}}^1\times {\mathrm{1493}}^1$

素因数の和:1530

約数の個数: 32

約数和(自身を含む): 33465600

約数和(自身を除く): 13493739

約数列:

[1, 3, 7, 13, 21, 39, 49, 91, 147, 273, 343, 637, 1029, 1493, 1911, 4459, 4479, 10451, 13377, 19409, 31353, 58227, 73157, 135863, 219471, 407589, 512099, 951041, 1536297, 2853123, 6657287, 19971861]

約数ペア:

[(1, 19971861), (3, 6657287), (7, 2853123), (13, 1536297), (21, 951041), (39, 512099), (49, 407589), (91, 219471), (147, 135863), (273, 73157), (343, 58227), (637, 31353), (1029, 19409), (1493, 13377), (1911, 10451), (4459, 4479)]