21249475

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{433}}^1$

素因数の和:607

約数の個数: 24

約数和(自身を含む): 28630112

約数和(自身を除く): 7380637

約数列:

[1, 5, 13, 25, 65, 151, 325, 433, 755, 1963, 2165, 3775, 5629, 9815, 10825, 28145, 49075, 65383, 140725, 326915, 849979, 1634575, 4249895, 21249475]

約数ペア:

[(1, 21249475), (5, 4249895), (13, 1634575), (25, 849979), (65, 326915), (151, 140725), (325, 65383), (433, 49075), (755, 28145), (1963, 10825), (2165, 9815), (3775, 5629)]