15511780

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{127}}^1\times {\mathrm{197}}^1$

素因数の和:364

約数の個数: 48

約数和(自身を含む): 34062336

約数和(自身を除く): 18550556

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 127, 155, 197, 254, 310, 394, 508, 620, 635, 788, 985, 1270, 1970, 2540, 3937, 3940, 6107, 7874, 12214, 15748, 19685, 24428, 25019, 30535, 39370, 50038, 61070, 78740, 100076, 122140, 125095, 250190, 500380, 775589, 1551178, 3102356, 3877945, 7755890, 15511780]

約数ペア:

[(1, 15511780), (2, 7755890), (4, 3877945), (5, 3102356), (10, 1551178), (20, 775589), (31, 500380), (62, 250190), (124, 125095), (127, 122140), (155, 100076), (197, 78740), (254, 61070), (310, 50038), (394, 39370), (508, 30535), (620, 25019), (635, 24428), (788, 19685), (985, 15748), (1270, 12214), (1970, 7874), (2540, 6107), (3937, 3940)]