21505143

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{79}}^1\times {\mathrm{113}}^1$

素因数の和:279

約数の個数: 32

約数和(自身を含む): 32394240

約数和(自身を除く): 10889097

約数列:

[1, 3, 11, 33, 73, 79, 113, 219, 237, 339, 803, 869, 1243, 2409, 2607, 3729, 5767, 8249, 8927, 17301, 24747, 26781, 63437, 90739, 98197, 190311, 272217, 294591, 651671, 1955013, 7168381, 21505143]

約数ペア:

[(1, 21505143), (3, 7168381), (11, 1955013), (33, 651671), (73, 294591), (79, 272217), (113, 190311), (219, 98197), (237, 90739), (339, 63437), (803, 26781), (869, 24747), (1243, 17301), (2409, 8927), (2607, 8249), (3729, 5767)]