21363880

素因数分解:

$2^3\times 5^1\times {\mathrm{389}}^1\times {\mathrm{1373}}^1$

素因数の和:1773

約数の個数: 32

約数和(自身を含む): 48227400

約数和(自身を除く): 26863520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 389, 778, 1373, 1556, 1945, 2746, 3112, 3890, 5492, 6865, 7780, 10984, 13730, 15560, 27460, 54920, 534097, 1068194, 2136388, 2670485, 4272776, 5340970, 10681940, 21363880]

約数ペア:

[(1, 21363880), (2, 10681940), (4, 5340970), (5, 4272776), (8, 2670485), (10, 2136388), (20, 1068194), (40, 534097), (389, 54920), (778, 27460), (1373, 15560), (1556, 13730), (1945, 10984), (2746, 7780), (3112, 6865), (3890, 5492)]