21078212

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{1163}}^1$

素因数の和:1387

約数の個数: 24

約数和(自身を含む): 38719296

約数和(自身を除く): 17641084

約数列:

[1, 2, 4, 23, 46, 92, 197, 394, 788, 1163, 2326, 4531, 4652, 9062, 18124, 26749, 53498, 106996, 229111, 458222, 916444, 5269553, 10539106, 21078212]

約数ペア:

[(1, 21078212), (2, 10539106), (4, 5269553), (23, 916444), (46, 458222), (92, 229111), (197, 106996), (394, 53498), (788, 26749), (1163, 18124), (2326, 9062), (4531, 4652)]