21660741

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{197}}^1\times {\mathrm{643}}^1$

素因数の和:865

約数の個数: 24

約数和(自身を含む): 33153120

約数和(自身を除く): 11492379

約数列:

[1, 3, 9, 19, 57, 171, 197, 591, 643, 1773, 1929, 3743, 5787, 11229, 12217, 33687, 36651, 109953, 126671, 380013, 1140039, 2406749, 7220247, 21660741]

約数ペア:

[(1, 21660741), (3, 7220247), (9, 2406749), (19, 1140039), (57, 380013), (171, 126671), (197, 109953), (591, 36651), (643, 33687), (1773, 12217), (1929, 11229), (3743, 5787)]