81881488

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{20719}}^1$

素因数の和:20759

約数の個数: 40

約数和(自身を含む): 179849600

約数和(自身を除く): 97968112

約数列:

[1, 2, 4, 8, 13, 16, 19, 26, 38, 52, 76, 104, 152, 208, 247, 304, 494, 988, 1976, 3952, 20719, 41438, 82876, 165752, 269347, 331504, 393661, 538694, 787322, 1077388, 1574644, 2154776, 3149288, 4309552, 5117593, 6298576, 10235186, 20470372, 40940744, 81881488]

約数ペア:

[(1, 81881488), (2, 40940744), (4, 20470372), (8, 10235186), (13, 6298576), (16, 5117593), (19, 4309552), (26, 3149288), (38, 2154776), (52, 1574644), (76, 1077388), (104, 787322), (152, 538694), (208, 393661), (247, 331504), (304, 269347), (494, 165752), (988, 82876), (1976, 41438), (3952, 20719)]