21049749

素因数分解:

$3^2\times 7^1\times {\mathrm{47}}^1\times {\mathrm{7109}}^1$

素因数の和:7169

約数の個数: 24

約数和(自身を含む): 35493120

約数和(自身を除く): 14443371

約数列:

[1, 3, 7, 9, 21, 47, 63, 141, 329, 423, 987, 2961, 7109, 21327, 49763, 63981, 149289, 334123, 447867, 1002369, 2338861, 3007107, 7016583, 21049749]

約数ペア:

[(1, 21049749), (3, 7016583), (7, 3007107), (9, 2338861), (21, 1002369), (47, 447867), (63, 334123), (141, 149289), (329, 63981), (423, 49763), (987, 21327), (2961, 7109)]