21201375

素因数分解:

$3^1\times 5^3\times {\mathrm{13}}^1\times {\mathrm{4349}}^1$

素因数の和:4380

約数の個数: 32

約数和(自身を含む): 38001600

約数和(自身を除く): 16800225

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 125, 195, 325, 375, 975, 1625, 4349, 4875, 13047, 21745, 56537, 65235, 108725, 169611, 282685, 326175, 543625, 848055, 1413425, 1630875, 4240275, 7067125, 21201375]

約数ペア:

[(1, 21201375), (3, 7067125), (5, 4240275), (13, 1630875), (15, 1413425), (25, 848055), (39, 543625), (65, 326175), (75, 282685), (125, 169611), (195, 108725), (325, 65235), (375, 56537), (975, 21745), (1625, 13047), (4349, 4875)]