81017320

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{4159}}^1$

素因数の和:4657

約数の個数: 32

約数和(自身を含む): 182707200

約数和(自身を除く): 101689880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 974, 1948, 2435, 3896, 4159, 4870, 8318, 9740, 16636, 19480, 20795, 33272, 41590, 83180, 166360, 2025433, 4050866, 8101732, 10127165, 16203464, 20254330, 40508660, 81017320]

約数ペア:

[(1, 81017320), (2, 40508660), (4, 20254330), (5, 16203464), (8, 10127165), (10, 8101732), (20, 4050866), (40, 2025433), (487, 166360), (974, 83180), (1948, 41590), (2435, 33272), (3896, 20795), (4159, 19480), (4870, 16636), (8318, 9740)]