21020804

素因数分解:

$2^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{4663}}^1$

素因数の和:4704

約数の個数: 36

約数和(自身を含む): 44662464

約数和(自身を除く): 23641660

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 49, 92, 98, 161, 196, 322, 644, 1127, 2254, 4508, 4663, 9326, 18652, 32641, 65282, 107249, 130564, 214498, 228487, 428996, 456974, 750743, 913948, 1501486, 3002972, 5255201, 10510402, 21020804]

約数ペア:

[(1, 21020804), (2, 10510402), (4, 5255201), (7, 3002972), (14, 1501486), (23, 913948), (28, 750743), (46, 456974), (49, 428996), (92, 228487), (98, 214498), (161, 130564), (196, 107249), (322, 65282), (644, 32641), (1127, 18652), (2254, 9326), (4508, 4663)]