278897801

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{1297}}^1$

素因数の和:1473

約数の個数: 32

約数和(自身を含む): 366347520

約数和(自身を除く): 87449719

約数列:

[1, 7, 13, 17, 91, 119, 139, 221, 973, 1297, 1547, 1807, 2363, 9079, 12649, 16541, 16861, 22049, 30719, 118027, 154343, 180283, 215033, 286637, 1261981, 2006459, 2343679, 3064811, 16405753, 21453677, 39842543, 278897801]

約数ペア:

[(1, 278897801), (7, 39842543), (13, 21453677), (17, 16405753), (91, 3064811), (119, 2343679), (139, 2006459), (221, 1261981), (973, 286637), (1297, 215033), (1547, 180283), (1807, 154343), (2363, 118027), (9079, 30719), (12649, 22049), (16541, 16861)]