21293395

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 28512000

約数和(自身を除く): 7218605

約数列:

[1, 5, 19, 29, 59, 95, 131, 145, 295, 551, 655, 1121, 1711, 2489, 2755, 3799, 5605, 7729, 8555, 12445, 18995, 32509, 38645, 72181, 146851, 162545, 224141, 360905, 734255, 1120705, 4258679, 21293395]

約数ペア:

[(1, 21293395), (5, 4258679), (19, 1120705), (29, 734255), (59, 360905), (95, 224141), (131, 162545), (145, 146851), (295, 72181), (551, 38645), (655, 32509), (1121, 18995), (1711, 12445), (2489, 8555), (2755, 7729), (3799, 5605)]