21991228

素因数分解:

$2^2\times 7^1\times {\mathrm{167}}^1\times {\mathrm{4703}}^1$

素因数の和:4881

約数の個数: 24

約数和(自身を含む): 44255232

約数和(自身を除く): 22264004

約数列:

[1, 2, 4, 7, 14, 28, 167, 334, 668, 1169, 2338, 4676, 4703, 9406, 18812, 32921, 65842, 131684, 785401, 1570802, 3141604, 5497807, 10995614, 21991228]

約数ペア:

[(1, 21991228), (2, 10995614), (4, 5497807), (7, 3141604), (14, 1570802), (28, 785401), (167, 131684), (334, 65842), (668, 32921), (1169, 18812), (2338, 9406), (4676, 4703)]