19724980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89659}}^1$

素因数の和:89679

約数の個数: 24

約数和(自身を含む): 45188640

約数和(自身を除く): 25463660

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 89659, 179318, 358636, 448295, 896590, 986249, 1793180, 1972498, 3944996, 4931245, 9862490, 19724980]

約数ペア:

[(1, 19724980), (2, 9862490), (4, 4931245), (5, 3944996), (10, 1972498), (11, 1793180), (20, 986249), (22, 896590), (44, 448295), (55, 358636), (110, 179318), (220, 89659)]