21780585

素因数分解:

$3^2\times 5^1\times {\mathrm{431}}^1\times {\mathrm{1123}}^1$

素因数の和:1565

約数の個数: 24

約数和(自身を含む): 37874304

約数和(自身を除く): 16093719

約数列:

[1, 3, 5, 9, 15, 45, 431, 1123, 1293, 2155, 3369, 3879, 5615, 6465, 10107, 16845, 19395, 50535, 484013, 1452039, 2420065, 4356117, 7260195, 21780585]

約数ペア:

[(1, 21780585), (3, 7260195), (5, 4356117), (9, 2420065), (15, 1452039), (45, 484013), (431, 50535), (1123, 19395), (1293, 16845), (2155, 10107), (3369, 6465), (3879, 5615)]