21240585

素因数分解:

$3^2\times 5^1\times {\mathrm{317}}^1\times {\mathrm{1489}}^1$

素因数の和:1817

約数の個数: 24

約数和(自身を含む): 36957960

約数和(自身を除く): 15717375

約数列:

[1, 3, 5, 9, 15, 45, 317, 951, 1489, 1585, 2853, 4467, 4755, 7445, 13401, 14265, 22335, 67005, 472013, 1416039, 2360065, 4248117, 7080195, 21240585]

約数ペア:

[(1, 21240585), (3, 7080195), (5, 4248117), (9, 2360065), (15, 1416039), (45, 472013), (317, 67005), (951, 22335), (1489, 14265), (1585, 13401), (2853, 7445), (4467, 4755)]