21012904

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{73}}^1\times {\mathrm{3271}}^1$

素因数の和:3361

約数の個数: 32

約数和(自身を含む): 43583040

約数和(自身を除く): 22570136

約数列:

[1, 2, 4, 8, 11, 22, 44, 73, 88, 146, 292, 584, 803, 1606, 3212, 3271, 6424, 6542, 13084, 26168, 35981, 71962, 143924, 238783, 287848, 477566, 955132, 1910264, 2626613, 5253226, 10506452, 21012904]

約数ペア:

[(1, 21012904), (2, 10506452), (4, 5253226), (8, 2626613), (11, 1910264), (22, 955132), (44, 477566), (73, 287848), (88, 238783), (146, 143924), (292, 71962), (584, 35981), (803, 26168), (1606, 13084), (3212, 6542), (3271, 6424)]