161895820

素因数分解:

$2^2\times 5^1\times {\mathrm{1279}}^1\times {\mathrm{6329}}^1$

素因数の和:7617

約数の個数: 24

約数和(自身を含む): 340300800

約数和(自身を除く): 178404980

約数列:

[1, 2, 4, 5, 10, 20, 1279, 2558, 5116, 6329, 6395, 12658, 12790, 25316, 25580, 31645, 63290, 126580, 8094791, 16189582, 32379164, 40473955, 80947910, 161895820]

約数ペア:

[(1, 161895820), (2, 80947910), (4, 40473955), (5, 32379164), (10, 16189582), (20, 8094791), (1279, 126580), (2558, 63290), (5116, 31645), (6329, 25580), (6395, 25316), (12658, 12790)]