19955871

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{191}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 33546240

約数和(自身を除く): 13590369

約数列:

[1, 3, 9, 13, 19, 39, 47, 57, 117, 141, 171, 191, 247, 423, 573, 611, 741, 893, 1719, 1833, 2223, 2483, 2679, 3629, 5499, 7449, 8037, 8977, 10887, 11609, 22347, 26931, 32661, 34827, 47177, 80793, 104481, 116701, 141531, 170563, 350103, 424593, 511689, 1050309, 1535067, 2217319, 6651957, 19955871]

約数ペア:

[(1, 19955871), (3, 6651957), (9, 2217319), (13, 1535067), (19, 1050309), (39, 511689), (47, 424593), (57, 350103), (117, 170563), (141, 141531), (171, 116701), (191, 104481), (247, 80793), (423, 47177), (573, 34827), (611, 32661), (741, 26931), (893, 22347), (1719, 11609), (1833, 10887), (2223, 8977), (2483, 8037), (2679, 7449), (3629, 5499)]