21507651

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{2441}}^1$

素因数の和:2547

約数の個数: 24

約数和(自身を含む): 34285680

約数和(自身を除く): 12778029

約数列:

[1, 3, 9, 11, 33, 89, 99, 267, 801, 979, 2441, 2937, 7323, 8811, 21969, 26851, 80553, 217249, 241659, 651747, 1955241, 2389739, 7169217, 21507651]

約数ペア:

[(1, 21507651), (3, 7169217), (9, 2389739), (11, 1955241), (33, 651747), (89, 241659), (99, 217249), (267, 80553), (801, 26851), (979, 21969), (2441, 8811), (2937, 7323)]