20217225

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{97}}^1\times {\mathrm{397}}^1$

素因数の和:514

約数の個数: 48

約数和(自身を含む): 38691968

約数和(自身を除く): 18474743

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 97, 105, 175, 291, 397, 485, 525, 679, 1191, 1455, 1985, 2037, 2425, 2779, 3395, 5955, 7275, 8337, 9925, 10185, 13895, 16975, 29775, 38509, 41685, 50925, 69475, 115527, 192545, 208425, 269563, 577635, 808689, 962725, 1347815, 2888175, 4043445, 6739075, 20217225]

約数ペア:

[(1, 20217225), (3, 6739075), (5, 4043445), (7, 2888175), (15, 1347815), (21, 962725), (25, 808689), (35, 577635), (75, 269563), (97, 208425), (105, 192545), (175, 115527), (291, 69475), (397, 50925), (485, 41685), (525, 38509), (679, 29775), (1191, 16975), (1455, 13895), (1985, 10185), (2037, 9925), (2425, 8337), (2779, 7275), (3395, 5955)]