21391980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{356533}}^1$

素因数の和:356545

約数の個数: 24

約数和(自身を含む): 59897712

約数和(自身を除く): 38505732

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 356533, 713066, 1069599, 1426132, 1782665, 2139198, 3565330, 4278396, 5347995, 7130660, 10695990, 21391980]

約数ペア:

[(1, 21391980), (2, 10695990), (3, 7130660), (4, 5347995), (5, 4278396), (6, 3565330), (10, 2139198), (12, 1782665), (15, 1426132), (20, 1069599), (30, 713066), (60, 356533)]