154969820

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{19919}}^1$

素因数の和:20317

約数の個数: 24

約数和(自身を含む): 326289600

約数和(自身を除く): 171319780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 3890, 7780, 19919, 39838, 79676, 99595, 199190, 398380, 7748491, 15496982, 30993964, 38742455, 77484910, 154969820]

約数ペア:

[(1, 154969820), (2, 77484910), (4, 38742455), (5, 30993964), (10, 15496982), (20, 7748491), (389, 398380), (778, 199190), (1556, 99595), (1945, 79676), (3890, 39838), (7780, 19919)]