123811280

素因数分解:

$2^4\times 5^1\times {\mathrm{1547641}}^1$

素因数の和:1547654

約数の個数: 20

約数和(自身を含む): 287861412

約数和(自身を除く): 164050132

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1547641, 3095282, 6190564, 7738205, 12381128, 15476410, 24762256, 30952820, 61905640, 123811280]

約数ペア:

[(1, 123811280), (2, 61905640), (4, 30952820), (5, 24762256), (8, 15476410), (10, 12381128), (16, 7738205), (20, 6190564), (40, 3095282), (80, 1547641)]