20995160

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1069}}^1$

素因数の和:1571

約数の個数: 32

約数和(自身を含む): 47379600

約数和(自身を除く): 26384440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1069, 1964, 2138, 2455, 3928, 4276, 4910, 5345, 8552, 9820, 10690, 19640, 21380, 42760, 524879, 1049758, 2099516, 2624395, 4199032, 5248790, 10497580, 20995160]

約数ペア:

[(1, 20995160), (2, 10497580), (4, 5248790), (5, 4199032), (8, 2624395), (10, 2099516), (20, 1049758), (40, 524879), (491, 42760), (982, 21380), (1069, 19640), (1964, 10690), (2138, 9820), (2455, 8552), (3928, 5345), (4276, 4910)]