199972420

素因数分解:

$2^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{181}}^1\times {\mathrm{1493}}^1$

素因数の和:1720

約数の個数: 48

約数和(自身を含む): 433965168

約数和(自身を除く): 233992748

約数列:

[1, 2, 4, 5, 10, 20, 37, 74, 148, 181, 185, 362, 370, 724, 740, 905, 1493, 1810, 2986, 3620, 5972, 6697, 7465, 13394, 14930, 26788, 29860, 33485, 55241, 66970, 110482, 133940, 220964, 270233, 276205, 540466, 552410, 1080932, 1104820, 1351165, 2702330, 5404660, 9998621, 19997242, 39994484, 49993105, 99986210, 199972420]

約数ペア:

[(1, 199972420), (2, 99986210), (4, 49993105), (5, 39994484), (10, 19997242), (20, 9998621), (37, 5404660), (74, 2702330), (148, 1351165), (181, 1104820), (185, 1080932), (362, 552410), (370, 540466), (724, 276205), (740, 270233), (905, 220964), (1493, 133940), (1810, 110482), (2986, 66970), (3620, 55241), (5972, 33485), (6697, 29860), (7465, 26788), (13394, 14930)]