180721240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{645433}}^1$

素因数の和:645451

約数の個数: 32

約数和(自身を含む): 464712480

約数和(自身を除く): 283991240

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 645433, 1290866, 2581732, 3227165, 4518031, 5163464, 6454330, 9036062, 12908660, 18072124, 22590155, 25817320, 36144248, 45180310, 90360620, 180721240]

約数ペア:

[(1, 180721240), (2, 90360620), (4, 45180310), (5, 36144248), (7, 25817320), (8, 22590155), (10, 18072124), (14, 12908660), (20, 9036062), (28, 6454330), (35, 5163464), (40, 4518031), (56, 3227165), (70, 2581732), (140, 1290866), (280, 645433)]