21978020005

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{103}}^1\times {\mathrm{25237}}^1$

素因数の和:25453

約数の個数: 32

約数和(自身を含む): 28347321600

約数和(自身を除く): 6369301595

約数列:

[1, 5, 19, 89, 95, 103, 445, 515, 1691, 1957, 8455, 9167, 9785, 25237, 45835, 126185, 174173, 479503, 870865, 2246093, 2397515, 2599411, 11230465, 12997055, 42675767, 49388809, 213378835, 231347579, 246944045, 1156737895, 4395604001, 21978020005]

約数ペア:

[(1, 21978020005), (5, 4395604001), (19, 1156737895), (89, 246944045), (95, 231347579), (103, 213378835), (445, 49388809), (515, 42675767), (1691, 12997055), (1957, 11230465), (8455, 2599411), (9167, 2397515), (9785, 2246093), (25237, 870865), (45835, 479503), (126185, 174173)]