21115445

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{197}}^1$

素因数の和:329

約数の個数: 32

約数和(自身を含む): 29338848

約数和(自身を除く): 8223403

約数列:

[1, 5, 13, 17, 65, 85, 97, 197, 221, 485, 985, 1105, 1261, 1649, 2561, 3349, 6305, 8245, 12805, 16745, 19109, 21437, 43537, 95545, 107185, 217685, 248417, 324853, 1242085, 1624265, 4223089, 21115445]

約数ペア:

[(1, 21115445), (5, 4223089), (13, 1624265), (17, 1242085), (65, 324853), (85, 248417), (97, 217685), (197, 107185), (221, 95545), (485, 43537), (985, 21437), (1105, 19109), (1261, 16745), (1649, 12805), (2561, 8245), (3349, 6305)]