21821554

素因数分解:

$2^1\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{2851}}^1$

素因数の和:2985

約数の個数: 16

約数和(自身を含む): 33881760

約数和(自身を除く): 12060206

約数列:

[1, 2, 43, 86, 89, 178, 2851, 3827, 5702, 7654, 122593, 245186, 253739, 507478, 10910777, 21821554]

約数ペア:

[(1, 21821554), (2, 10910777), (43, 507478), (86, 253739), (89, 245186), (178, 122593), (2851, 7654), (3827, 5702)]