21415840

素因数分解:

$2^5\times 5^1\times {\mathrm{137}}^1\times {\mathrm{977}}^1$

素因数の和:1129

約数の個数: 48

約数和(自身を含む): 51016392

約数和(自身を除く): 29600552

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 137, 160, 274, 548, 685, 977, 1096, 1370, 1954, 2192, 2740, 3908, 4384, 4885, 5480, 7816, 9770, 10960, 15632, 19540, 21920, 31264, 39080, 78160, 133849, 156320, 267698, 535396, 669245, 1070792, 1338490, 2141584, 2676980, 4283168, 5353960, 10707920, 21415840]

約数ペア:

[(1, 21415840), (2, 10707920), (4, 5353960), (5, 4283168), (8, 2676980), (10, 2141584), (16, 1338490), (20, 1070792), (32, 669245), (40, 535396), (80, 267698), (137, 156320), (160, 133849), (274, 78160), (548, 39080), (685, 31264), (977, 21920), (1096, 19540), (1370, 15632), (1954, 10960), (2192, 9770), (2740, 7816), (3908, 5480), (4384, 4885)]