21086660

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{21517}}^1$

素因数の和:21540

約数の個数: 36

約数和(自身を含む): 51514092

約数和(自身を除く): 30427432

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 21517, 43034, 86068, 107585, 150619, 215170, 301238, 430340, 602476, 753095, 1054333, 1506190, 2108666, 3012380, 4217332, 5271665, 10543330, 21086660]

約数ペア:

[(1, 21086660), (2, 10543330), (4, 5271665), (5, 4217332), (7, 3012380), (10, 2108666), (14, 1506190), (20, 1054333), (28, 753095), (35, 602476), (49, 430340), (70, 301238), (98, 215170), (140, 150619), (196, 107585), (245, 86068), (490, 43034), (980, 21517)]