21084319

素因数分解:

${\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{197}}^1$

素因数の和:390

約数の個数: 16

約数和(自身を含む): 22999680

約数和(自身を除く): 1915361

約数列:

[1, 19, 43, 131, 197, 817, 2489, 3743, 5633, 8471, 25807, 107027, 160949, 490333, 1109701, 21084319]

約数ペア:

[(1, 21084319), (19, 1109701), (43, 490333), (131, 160949), (197, 107027), (817, 25807), (2489, 8471), (3743, 5633)]