21864521

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:185

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 5714359

約数列:

[1, 7, 29, 37, 41, 71, 203, 259, 287, 497, 1073, 1189, 1517, 2059, 2627, 2911, 7511, 8323, 10619, 14413, 18389, 20377, 43993, 76183, 84419, 107707, 307951, 533281, 590933, 753949, 3123503, 21864521]

約数ペア:

[(1, 21864521), (7, 3123503), (29, 753949), (37, 590933), (41, 533281), (71, 307951), (203, 107707), (259, 84419), (287, 76183), (497, 43993), (1073, 20377), (1189, 18389), (1517, 14413), (2059, 10619), (2627, 8323), (2911, 7511)]