21999640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{42307}}^1$

素因数の和:42331

約数の個数: 32

約数和(自身を含む): 53308080

約数和(自身を除く): 31308440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 42307, 84614, 169228, 211535, 338456, 423070, 549991, 846140, 1099982, 1692280, 2199964, 2749955, 4399928, 5499910, 10999820, 21999640]

約数ペア:

[(1, 21999640), (2, 10999820), (4, 5499910), (5, 4399928), (8, 2749955), (10, 2199964), (13, 1692280), (20, 1099982), (26, 846140), (40, 549991), (52, 423070), (65, 338456), (104, 211535), (130, 169228), (260, 84614), (520, 42307)]