21328720

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{5441}}^1$

素因数の和:5468

約数の個数: 60

約数和(自身を含む): 57696084

約数和(自身を除く): 36367364

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 5441, 10882, 21764, 27205, 38087, 43528, 54410, 76174, 87056, 108820, 152348, 190435, 217640, 266609, 304696, 380870, 435280, 533218, 609392, 761740, 1066436, 1333045, 1523480, 2132872, 2666090, 3046960, 4265744, 5332180, 10664360, 21328720]

約数ペア:

[(1, 21328720), (2, 10664360), (4, 5332180), (5, 4265744), (7, 3046960), (8, 2666090), (10, 2132872), (14, 1523480), (16, 1333045), (20, 1066436), (28, 761740), (35, 609392), (40, 533218), (49, 435280), (56, 380870), (70, 304696), (80, 266609), (98, 217640), (112, 190435), (140, 152348), (196, 108820), (245, 87056), (280, 76174), (392, 54410), (490, 43528), (560, 38087), (784, 27205), (980, 21764), (1960, 10882), (3920, 5441)]