21520737

素因数分解:

$3^2\times 7^1\times {\mathrm{113}}^1\times {\mathrm{3023}}^1$

素因数の和:3149

約数の個数: 24

約数和(自身を含む): 35852544

約数和(自身を除く): 14331807

約数列:

[1, 3, 7, 9, 21, 63, 113, 339, 791, 1017, 2373, 3023, 7119, 9069, 21161, 27207, 63483, 190449, 341599, 1024797, 2391193, 3074391, 7173579, 21520737]

約数ペア:

[(1, 21520737), (3, 7173579), (7, 3074391), (9, 2391193), (21, 1024797), (63, 341599), (113, 190449), (339, 63483), (791, 27207), (1017, 21161), (2373, 9069), (3023, 7119)]