20404755

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{307}}^1$

素因数の和:536

約数の個数: 48

約数和(自身を含む): 40744704

約数和(自身を除く): 20339949

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 211, 307, 315, 633, 921, 1055, 1477, 1535, 1899, 2149, 2763, 3165, 4431, 4605, 6447, 7385, 9495, 10745, 13293, 13815, 19341, 22155, 32235, 64777, 66465, 96705, 194331, 323885, 453439, 582993, 971655, 1360317, 2267195, 2914965, 4080951, 6801585, 20404755]

約数ペア:

[(1, 20404755), (3, 6801585), (5, 4080951), (7, 2914965), (9, 2267195), (15, 1360317), (21, 971655), (35, 582993), (45, 453439), (63, 323885), (105, 194331), (211, 96705), (307, 66465), (315, 64777), (633, 32235), (921, 22155), (1055, 19341), (1477, 13815), (1535, 13293), (1899, 10745), (2149, 9495), (2763, 7385), (3165, 6447), (4431, 4605)]