20678973

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{51827}}^1$

素因数の和:51856

約数の個数: 16

約数和(自身を含む): 33169920

約数和(自身を除く): 12490947

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 51827, 155481, 362789, 984713, 1088367, 2954139, 6892991, 20678973]

約数ペア:

[(1, 20678973), (3, 6892991), (7, 2954139), (19, 1088367), (21, 984713), (57, 362789), (133, 155481), (399, 51827)]