21854420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4219}}^1$

素因数の和:4272

約数の個数: 48

約数和(自身を含む): 53880960

約数和(自身を除く): 32026540

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4219, 5180, 8438, 16876, 21095, 29533, 42190, 59066, 84380, 118132, 147665, 156103, 295330, 312206, 590660, 624412, 780515, 1092721, 1561030, 2185442, 3122060, 4370884, 5463605, 10927210, 21854420]

約数ペア:

[(1, 21854420), (2, 10927210), (4, 5463605), (5, 4370884), (7, 3122060), (10, 2185442), (14, 1561030), (20, 1092721), (28, 780515), (35, 624412), (37, 590660), (70, 312206), (74, 295330), (140, 156103), (148, 147665), (185, 118132), (259, 84380), (370, 59066), (518, 42190), (740, 29533), (1036, 21095), (1295, 16876), (2590, 8438), (4219, 5180)]