21004840

素因数分解:

$2^3\times 5^1\times {\mathrm{137}}^1\times {\mathrm{3833}}^1$

素因数の和:3981

約数の個数: 32

約数和(自身を含む): 47618280

約数和(自身を除く): 26613440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 137, 274, 548, 685, 1096, 1370, 2740, 3833, 5480, 7666, 15332, 19165, 30664, 38330, 76660, 153320, 525121, 1050242, 2100484, 2625605, 4200968, 5251210, 10502420, 21004840]

約数ペア:

[(1, 21004840), (2, 10502420), (4, 5251210), (5, 4200968), (8, 2625605), (10, 2100484), (20, 1050242), (40, 525121), (137, 153320), (274, 76660), (548, 38330), (685, 30664), (1096, 19165), (1370, 15332), (2740, 7666), (3833, 5480)]