21490190

素因数分解:

$2^1\times 5^1\times {\mathrm{1361}}^1\times {\mathrm{1579}}^1$

素因数の和:2947

約数の個数: 16

約数和(自身を含む): 38735280

約数和(自身を除く): 17245090

約数列:

[1, 2, 5, 10, 1361, 1579, 2722, 3158, 6805, 7895, 13610, 15790, 2149019, 4298038, 10745095, 21490190]

約数ペア:

[(1, 21490190), (2, 10745095), (5, 4298038), (10, 2149019), (1361, 15790), (1579, 13610), (2722, 7895), (3158, 6805)]