128590940

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{661}}^1$

素因数の和:878

約数の個数: 48

約数和(自身を含む): 276260544

約数和(自身を除く): 147669604

約数列:

[1, 2, 4, 5, 10, 20, 71, 137, 142, 274, 284, 355, 548, 661, 685, 710, 1322, 1370, 1420, 2644, 2740, 3305, 6610, 9727, 13220, 19454, 38908, 46931, 48635, 90557, 93862, 97270, 181114, 187724, 194540, 234655, 362228, 452785, 469310, 905570, 938620, 1811140, 6429547, 12859094, 25718188, 32147735, 64295470, 128590940]

約数ペア:

[(1, 128590940), (2, 64295470), (4, 32147735), (5, 25718188), (10, 12859094), (20, 6429547), (71, 1811140), (137, 938620), (142, 905570), (274, 469310), (284, 452785), (355, 362228), (548, 234655), (661, 194540), (685, 187724), (710, 181114), (1322, 97270), (1370, 93862), (1420, 90557), (2644, 48635), (2740, 46931), (3305, 38908), (6610, 19454), (9727, 13220)]