81258560

素因数分解:

$2^6\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1289}}^1$

素因数の和:1503

約数の個数: 56

約数和(自身を含む): 194630040

約数和(自身を除く): 113371480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 197, 320, 394, 788, 985, 1289, 1576, 1970, 2578, 3152, 3940, 5156, 6304, 6445, 7880, 10312, 12608, 12890, 15760, 20624, 25780, 31520, 41248, 51560, 63040, 82496, 103120, 206240, 253933, 412480, 507866, 1015732, 1269665, 2031464, 2539330, 4062928, 5078660, 8125856, 10157320, 16251712, 20314640, 40629280, 81258560]

約数ペア:

[(1, 81258560), (2, 40629280), (4, 20314640), (5, 16251712), (8, 10157320), (10, 8125856), (16, 5078660), (20, 4062928), (32, 2539330), (40, 2031464), (64, 1269665), (80, 1015732), (160, 507866), (197, 412480), (320, 253933), (394, 206240), (788, 103120), (985, 82496), (1289, 63040), (1576, 51560), (1970, 41248), (2578, 31520), (3152, 25780), (3940, 20624), (5156, 15760), (6304, 12890), (6445, 12608), (7880, 10312)]