81581560

素因数分解:

$2^3\times 5^1\times {\mathrm{131}}^1\times {\mathrm{15569}}^1$

素因数の和:15711

約数の個数: 32

約数和(自身を含む): 184971600

約数和(自身を除く): 103390040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 131, 262, 524, 655, 1048, 1310, 2620, 5240, 15569, 31138, 62276, 77845, 124552, 155690, 311380, 622760, 2039539, 4079078, 8158156, 10197695, 16316312, 20395390, 40790780, 81581560]

約数ペア:

[(1, 81581560), (2, 40790780), (4, 20395390), (5, 16316312), (8, 10197695), (10, 8158156), (20, 4079078), (40, 2039539), (131, 622760), (262, 311380), (524, 155690), (655, 124552), (1048, 77845), (1310, 62276), (2620, 31138), (5240, 15569)]