19915720

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{45263}}^1$

素因数の和:45285

約数の個数: 32

約数和(自身を含む): 48885120

約数和(自身を除く): 28969400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 45263, 90526, 181052, 226315, 362104, 452630, 497893, 905260, 995786, 1810520, 1991572, 2489465, 3983144, 4978930, 9957860, 19915720]

約数ペア:

[(1, 19915720), (2, 9957860), (4, 4978930), (5, 3983144), (8, 2489465), (10, 1991572), (11, 1810520), (20, 995786), (22, 905260), (40, 497893), (44, 452630), (55, 362104), (88, 226315), (110, 181052), (220, 90526), (440, 45263)]