81257980

素因数分解:

$2^2\times 5^1\times {\mathrm{919}}^1\times {\mathrm{4421}}^1$

素因数の和:5349

約数の個数: 24

約数和(自身を含む): 170866080

約数和(自身を除く): 89608100

約数列:

[1, 2, 4, 5, 10, 20, 919, 1838, 3676, 4421, 4595, 8842, 9190, 17684, 18380, 22105, 44210, 88420, 4062899, 8125798, 16251596, 20314495, 40628990, 81257980]

約数ペア:

[(1, 81257980), (2, 40628990), (4, 20314495), (5, 16251596), (10, 8125798), (20, 4062899), (919, 88420), (1838, 44210), (3676, 22105), (4421, 18380), (4595, 17684), (8842, 9190)]