81391390

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{109}}^1\times {\mathrm{839}}^1$

素因数の和:1044

約数の個数: 32

約数和(自身を含む): 149688000

約数和(自身を除く): 68296610

約数列:

[1, 2, 5, 10, 89, 109, 178, 218, 445, 545, 839, 890, 1090, 1678, 4195, 8390, 9701, 19402, 48505, 74671, 91451, 97010, 149342, 182902, 373355, 457255, 746710, 914510, 8139139, 16278278, 40695695, 81391390]

約数ペア:

[(1, 81391390), (2, 40695695), (5, 16278278), (10, 8139139), (89, 914510), (109, 746710), (178, 457255), (218, 373355), (445, 182902), (545, 149342), (839, 97010), (890, 91451), (1090, 74671), (1678, 48505), (4195, 19402), (8390, 9701)]