20780380

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2671}}^1$

素因数の和:3069

約数の個数: 24

約数和(自身を含む): 43767360

約数和(自身を除く): 22986980

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2671, 3890, 5342, 7780, 10684, 13355, 26710, 53420, 1039019, 2078038, 4156076, 5195095, 10390190, 20780380]

約数ペア:

[(1, 20780380), (2, 10390190), (4, 5195095), (5, 4156076), (10, 2078038), (20, 1039019), (389, 53420), (778, 26710), (1556, 13355), (1945, 10684), (2671, 7780), (3890, 5342)]