21791841

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{523}}^1$

素因数の和:605

約数の個数: 32

約数和(自身を含む): 33200640

約数和(自身を除く): 11408799

約数列:

[1, 3, 17, 19, 43, 51, 57, 129, 323, 523, 731, 817, 969, 1569, 2193, 2451, 8891, 9937, 13889, 22489, 26673, 29811, 41667, 67467, 168929, 382313, 427291, 506787, 1146939, 1281873, 7263947, 21791841]

約数ペア:

[(1, 21791841), (3, 7263947), (17, 1281873), (19, 1146939), (43, 506787), (51, 427291), (57, 382313), (129, 168929), (323, 67467), (523, 41667), (731, 29811), (817, 26673), (969, 22489), (1569, 13889), (2193, 9937), (2451, 8891)]