138779560

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{111919}}^1$

素因数の和:111961

約数の個数: 32

約数和(自身を含む): 322329600

約数和(自身を除く): 183550040

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 111919, 223838, 447676, 559595, 895352, 1119190, 2238380, 3469489, 4476760, 6938978, 13877956, 17347445, 27755912, 34694890, 69389780, 138779560]

約数ペア:

[(1, 138779560), (2, 69389780), (4, 34694890), (5, 27755912), (8, 17347445), (10, 13877956), (20, 6938978), (31, 4476760), (40, 3469489), (62, 2238380), (124, 1119190), (155, 895352), (248, 559595), (310, 447676), (620, 223838), (1240, 111919)]