21324980

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2741}}^1$

素因数の和:3139

約数の個数: 24

約数和(自身を含む): 44913960

約数和(自身を除く): 23588980

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2741, 3890, 5482, 7780, 10964, 13705, 27410, 54820, 1066249, 2132498, 4264996, 5331245, 10662490, 21324980]

約数ペア:

[(1, 21324980), (2, 10662490), (4, 5331245), (5, 4264996), (10, 2132498), (20, 1066249), (389, 54820), (778, 27410), (1556, 13705), (1945, 10964), (2741, 7780), (3890, 5482)]