21043395

素因数分解:

$3^4\times 5^1\times {\mathrm{223}}^1\times {\mathrm{233}}^1$

素因数の和:473

約数の個数: 40

約数和(自身を含む): 38054016

約数和(自身を除く): 17010621

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 223, 233, 405, 669, 699, 1115, 1165, 2007, 2097, 3345, 3495, 6021, 6291, 10035, 10485, 18063, 18873, 30105, 31455, 51959, 90315, 94365, 155877, 259795, 467631, 779385, 1402893, 2338155, 4208679, 7014465, 21043395]

約数ペア:

[(1, 21043395), (3, 7014465), (5, 4208679), (9, 2338155), (15, 1402893), (27, 779385), (45, 467631), (81, 259795), (135, 155877), (223, 94365), (233, 90315), (405, 51959), (669, 31455), (699, 30105), (1115, 18873), (1165, 18063), (2007, 10485), (2097, 10035), (3345, 6291), (3495, 6021)]