21801560

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{49549}}^1$

素因数の和:49571

約数の個数: 32

約数和(自身を含む): 53514000

約数和(自身を除く): 31712440

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 49549, 99098, 198196, 247745, 396392, 495490, 545039, 990980, 1090078, 1981960, 2180156, 2725195, 4360312, 5450390, 10900780, 21801560]

約数ペア:

[(1, 21801560), (2, 10900780), (4, 5450390), (5, 4360312), (8, 2725195), (10, 2180156), (11, 1981960), (20, 1090078), (22, 990980), (40, 545039), (44, 495490), (55, 396392), (88, 247745), (110, 198196), (220, 99098), (440, 49549)]