21969880

素因数分解:

$2^3\times 5^1\times {\mathrm{549247}}^1$

素因数の和:549258

約数の個数: 16

約数和(自身を含む): 49432320

約数和(自身を除く): 27462440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 549247, 1098494, 2196988, 2746235, 4393976, 5492470, 10984940, 21969880]

約数ペア:

[(1, 21969880), (2, 10984940), (4, 5492470), (5, 4393976), (8, 2746235), (10, 2196988), (20, 1098494), (40, 549247)]