21043209

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{151}}^1$

素因数の和:309

約数の個数: 32

約数和(自身を含む): 31868928

約数和(自身を除く): 10825719

約数列:

[1, 3, 11, 33, 41, 103, 123, 151, 309, 451, 453, 1133, 1353, 1661, 3399, 4223, 4983, 6191, 12669, 15553, 18573, 46453, 46659, 68101, 139359, 171083, 204303, 513249, 637673, 1913019, 7014403, 21043209]

約数ペア:

[(1, 21043209), (3, 7014403), (11, 1913019), (33, 637673), (41, 513249), (103, 204303), (123, 171083), (151, 139359), (309, 68101), (451, 46659), (453, 46453), (1133, 18573), (1353, 15553), (1661, 12669), (3399, 6191), (4223, 4983)]