21061125

素因数分解:

$3^2\times 5^3\times {\mathrm{97}}^1\times {\mathrm{193}}^1$

素因数の和:311

約数の個数: 48

約数和(自身を含む): 38556336

約数和(自身を除く): 17495211

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 97, 125, 193, 225, 291, 375, 485, 579, 873, 965, 1125, 1455, 1737, 2425, 2895, 4365, 4825, 7275, 8685, 12125, 14475, 18721, 21825, 24125, 36375, 43425, 56163, 72375, 93605, 109125, 168489, 217125, 280815, 468025, 842445, 1404075, 2340125, 4212225, 7020375, 21061125]

約数ペア:

[(1, 21061125), (3, 7020375), (5, 4212225), (9, 2340125), (15, 1404075), (25, 842445), (45, 468025), (75, 280815), (97, 217125), (125, 168489), (193, 109125), (225, 93605), (291, 72375), (375, 56163), (485, 43425), (579, 36375), (873, 24125), (965, 21825), (1125, 18721), (1455, 14475), (1737, 12125), (2425, 8685), (2895, 7275), (4365, 4825)]