21497735

素因数分解:

$5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1$

素因数の和:335

約数の個数: 32

約数和(自身を含む): 30772224

約数和(自身を除く): 9274489

約数列:

[1, 5, 7, 35, 41, 71, 205, 211, 287, 355, 497, 1055, 1435, 1477, 2485, 2911, 7385, 8651, 14555, 14981, 20377, 43255, 60557, 74905, 101885, 104867, 302785, 524335, 614221, 3071105, 4299547, 21497735]

約数ペア:

[(1, 21497735), (5, 4299547), (7, 3071105), (35, 614221), (41, 524335), (71, 302785), (205, 104867), (211, 101885), (287, 74905), (355, 60557), (497, 43255), (1055, 20377), (1435, 14981), (1477, 14555), (2485, 8651), (2911, 7385)]