21212211

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:219

約数の個数: 32

約数和(自身を含む): 30643200

約数和(自身を除く): 9430989

約数列:

[1, 3, 37, 41, 59, 79, 111, 123, 177, 237, 1517, 2183, 2419, 2923, 3239, 4551, 4661, 6549, 7257, 8769, 9717, 13983, 89503, 119843, 172457, 191101, 268509, 359529, 517371, 573303, 7070737, 21212211]

約数ペア:

[(1, 21212211), (3, 7070737), (37, 573303), (41, 517371), (59, 359529), (79, 268509), (111, 191101), (123, 172457), (177, 119843), (237, 89503), (1517, 13983), (2183, 9717), (2419, 8769), (2923, 7257), (3239, 6549), (4551, 4661)]