18664220

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2399}}^1$

素因数の和:2797

約数の個数: 24

約数和(自身を含む): 39312000

約数和(自身を除く): 20647780

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2399, 3890, 4798, 7780, 9596, 11995, 23990, 47980, 933211, 1866422, 3732844, 4666055, 9332110, 18664220]

約数ペア:

[(1, 18664220), (2, 9332110), (4, 4666055), (5, 3732844), (10, 1866422), (20, 933211), (389, 47980), (778, 23990), (1556, 11995), (1945, 9596), (2399, 7780), (3890, 4798)]