20874249

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:270

約数の個数: 48

約数和(自身を含む): 35493120

約数和(自身を除く): 14618871

約数列:

[1, 3, 9, 11, 17, 33, 51, 79, 99, 153, 157, 187, 237, 471, 561, 711, 869, 1343, 1413, 1683, 1727, 2607, 2669, 4029, 5181, 7821, 8007, 12087, 12403, 14773, 15543, 24021, 29359, 37209, 44319, 88077, 111627, 132957, 136433, 210851, 264231, 409299, 632553, 1227897, 1897659, 2319361, 6958083, 20874249]

約数ペア:

[(1, 20874249), (3, 6958083), (9, 2319361), (11, 1897659), (17, 1227897), (33, 632553), (51, 409299), (79, 264231), (99, 210851), (153, 136433), (157, 132957), (187, 111627), (237, 88077), (471, 44319), (561, 37209), (711, 29359), (869, 24021), (1343, 15543), (1413, 14773), (1683, 12403), (1727, 12087), (2607, 8007), (2669, 7821), (4029, 5181)]