81008860

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{25799}}^1$

素因数の和:25965

約数の個数: 24

約数和(自身を含む): 171208800

約数和(自身を除く): 90199940

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 25799, 51598, 103196, 128995, 257990, 515980, 4050443, 8100886, 16201772, 20252215, 40504430, 81008860]

約数ペア:

[(1, 81008860), (2, 40504430), (4, 20252215), (5, 16201772), (10, 8100886), (20, 4050443), (157, 515980), (314, 257990), (628, 128995), (785, 103196), (1570, 51598), (3140, 25799)]