20013160

素因数分解:

$2^3\times 5^1\times {\mathrm{491}}^1\times {\mathrm{1019}}^1$

素因数の和:1521

約数の個数: 32

約数和(自身を含む): 45165600

約数和(自身を除く): 25152440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 491, 982, 1019, 1964, 2038, 2455, 3928, 4076, 4910, 5095, 8152, 9820, 10190, 19640, 20380, 40760, 500329, 1000658, 2001316, 2501645, 4002632, 5003290, 10006580, 20013160]

約数ペア:

[(1, 20013160), (2, 10006580), (4, 5003290), (5, 4002632), (8, 2501645), (10, 2001316), (20, 1000658), (40, 500329), (491, 40760), (982, 20380), (1019, 19640), (1964, 10190), (2038, 9820), (2455, 8152), (3928, 5095), (4076, 4910)]