21208640

素因数分解:

$2^6\times 5^1\times {\mathrm{191}}^1\times {\mathrm{347}}^1$

素因数の和:555

約数の個数: 56

約数和(自身を含む): 50913792

約数和(自身を除く): 29705152

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 191, 320, 347, 382, 694, 764, 955, 1388, 1528, 1735, 1910, 2776, 3056, 3470, 3820, 5552, 6112, 6940, 7640, 11104, 12224, 13880, 15280, 22208, 27760, 30560, 55520, 61120, 66277, 111040, 132554, 265108, 331385, 530216, 662770, 1060432, 1325540, 2120864, 2651080, 4241728, 5302160, 10604320, 21208640]

約数ペア:

[(1, 21208640), (2, 10604320), (4, 5302160), (5, 4241728), (8, 2651080), (10, 2120864), (16, 1325540), (20, 1060432), (32, 662770), (40, 530216), (64, 331385), (80, 265108), (160, 132554), (191, 111040), (320, 66277), (347, 61120), (382, 55520), (694, 30560), (764, 27760), (955, 22208), (1388, 15280), (1528, 13880), (1735, 12224), (1910, 11104), (2776, 7640), (3056, 6940), (3470, 6112), (3820, 5552)]