19739560

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{15919}}^1$

素因数の和:15961

約数の個数: 32

約数和(自身を含む): 45849600

約数和(自身を除く): 26110040

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 15919, 31838, 63676, 79595, 127352, 159190, 318380, 493489, 636760, 986978, 1973956, 2467445, 3947912, 4934890, 9869780, 19739560]

約数ペア:

[(1, 19739560), (2, 9869780), (4, 4934890), (5, 3947912), (8, 2467445), (10, 1973956), (20, 986978), (31, 636760), (40, 493489), (62, 318380), (124, 159190), (155, 127352), (248, 79595), (310, 63676), (620, 31838), (1240, 15919)]