20516853

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1$

素因数の和:321

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 11739147

約数列:

[1, 3, 7, 21, 79, 83, 149, 237, 249, 447, 553, 581, 1043, 1659, 1743, 3129, 6557, 11771, 12367, 19671, 35313, 37101, 45899, 82397, 86569, 137697, 247191, 259707, 976993, 2930979, 6838951, 20516853]

約数ペア:

[(1, 20516853), (3, 6838951), (7, 2930979), (21, 976993), (79, 259707), (83, 247191), (149, 137697), (237, 86569), (249, 82397), (447, 45899), (553, 37101), (581, 35313), (1043, 19671), (1659, 12367), (1743, 11771), (3129, 6557)]