21000681212

素因数分解:

$2^2\times 7^1\times {\mathrm{1171}}^1\times {\mathrm{640499}}^1$

素因数の和:641681

約数の個数: 24

約数和(自身を含む): 42037296000

約数和(自身を除く): 21036614788

約数列:

[1, 2, 4, 7, 14, 28, 1171, 2342, 4684, 8197, 16394, 32788, 640499, 1280998, 2561996, 4483493, 8966986, 17933972, 750024329, 1500048658, 3000097316, 5250170303, 10500340606, 21000681212]

約数ペア:

[(1, 21000681212), (2, 10500340606), (4, 5250170303), (7, 3000097316), (14, 1500048658), (28, 750024329), (1171, 17933972), (2342, 8966986), (4684, 4483493), (8197, 2561996), (16394, 1280998), (32788, 640499)]