1289721425

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{19819}}^1$

素因数の和:19985

約数の個数: 24

約数和(自身を含む): 1695799200

約数和(自身を除く): 406077775

約数列:

[1, 5, 19, 25, 95, 137, 475, 685, 2603, 3425, 13015, 19819, 65075, 99095, 376561, 495475, 1882805, 2715203, 9414025, 13576015, 51588857, 67880075, 257944285, 1289721425]

約数ペア:

[(1, 1289721425), (5, 257944285), (19, 67880075), (25, 51588857), (95, 13576015), (137, 9414025), (475, 2715203), (685, 1882805), (2603, 495475), (3425, 376561), (13015, 99095), (19819, 65075)]