19748729

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 26906880

約数和(自身を除く): 7158151

約数列:

[1, 7, 11, 13, 77, 91, 109, 143, 181, 763, 1001, 1199, 1267, 1417, 1991, 2353, 8393, 9919, 13937, 15587, 16471, 19729, 25883, 109109, 138103, 181181, 217019, 256477, 1519133, 1795339, 2821247, 19748729]

約数ペア:

[(1, 19748729), (7, 2821247), (11, 1795339), (13, 1519133), (77, 256477), (91, 217019), (109, 181181), (143, 138103), (181, 109109), (763, 25883), (1001, 19729), (1199, 16471), (1267, 15587), (1417, 13937), (1991, 9919), (2353, 8393)]