19913960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{45259}}^1$

素因数の和:45281

約数の個数: 32

約数和(自身を含む): 48880800

約数和(自身を除く): 28966840

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440, 45259, 90518, 181036, 226295, 362072, 452590, 497849, 905180, 995698, 1810360, 1991396, 2489245, 3982792, 4978490, 9956980, 19913960]

約数ペア:

[(1, 19913960), (2, 9956980), (4, 4978490), (5, 3982792), (8, 2489245), (10, 1991396), (11, 1810360), (20, 995698), (22, 905180), (40, 497849), (44, 452590), (55, 362072), (88, 226295), (110, 181036), (220, 90518), (440, 45259)]