21418225

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{673}}^1$

素因数の和:769

約数の個数: 24

約数和(自身を含む): 28415840

約数和(自身を除く): 6997615

約数列:

[1, 5, 19, 25, 67, 95, 335, 475, 673, 1273, 1675, 3365, 6365, 12787, 16825, 31825, 45091, 63935, 225455, 319675, 856729, 1127275, 4283645, 21418225]

約数ペア:

[(1, 21418225), (5, 4283645), (19, 1127275), (25, 856729), (67, 319675), (95, 225455), (335, 63935), (475, 45091), (673, 31825), (1273, 16825), (1675, 12787), (3365, 6365)]