664555780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{249833}}^1$

素因数の和:249868

約数の個数: 48

約数和(自身を含む): 1678884480

約数和(自身を除く): 1014328700

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 249833, 499666, 999332, 1249165, 1748831, 2498330, 3497662, 4746827, 4996660, 6995324, 8744155, 9493654, 17488310, 18987308, 23734135, 33227789, 34976620, 47468270, 66455578, 94936540, 132911156, 166138945, 332277890, 664555780]

約数ペア:

[(1, 664555780), (2, 332277890), (4, 166138945), (5, 132911156), (7, 94936540), (10, 66455578), (14, 47468270), (19, 34976620), (20, 33227789), (28, 23734135), (35, 18987308), (38, 17488310), (70, 9493654), (76, 8744155), (95, 6995324), (133, 4996660), (140, 4746827), (190, 3497662), (266, 2498330), (380, 1748831), (532, 1249165), (665, 999332), (1330, 499666), (2660, 249833)]