21205725

素因数分解:

$3^1\times 5^2\times {\mathrm{337}}^1\times {\mathrm{839}}^1$

素因数の和:1189

約数の個数: 24

約数和(自身を含む): 35206080

約数和(自身を除く): 14000355

約数列:

[1, 3, 5, 15, 25, 75, 337, 839, 1011, 1685, 2517, 4195, 5055, 8425, 12585, 20975, 25275, 62925, 282743, 848229, 1413715, 4241145, 7068575, 21205725]

約数ペア:

[(1, 21205725), (3, 7068575), (5, 4241145), (15, 1413715), (25, 848229), (75, 282743), (337, 62925), (839, 25275), (1011, 20975), (1685, 12585), (2517, 8425), (4195, 5055)]