20819071

素因数分解:

$7^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1$

素因数の和:93

約数の個数: 40

約数和(自身を含む): 28234080

約数和(自身を除く): 7415009

約数列:

[1, 7, 13, 23, 29, 49, 91, 161, 203, 299, 343, 377, 637, 667, 1127, 1421, 2093, 2401, 2639, 4459, 4669, 7889, 8671, 9947, 14651, 18473, 31213, 32683, 55223, 60697, 69629, 102557, 129311, 228781, 424879, 717899, 905177, 1601467, 2974153, 20819071]

約数ペア:

[(1, 20819071), (7, 2974153), (13, 1601467), (23, 905177), (29, 717899), (49, 424879), (91, 228781), (161, 129311), (203, 102557), (299, 69629), (343, 60697), (377, 55223), (637, 32683), (667, 31213), (1127, 18473), (1421, 14651), (2093, 9947), (2401, 8671), (2639, 7889), (4459, 4669)]