21641084

素因数分解:

$2^2\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{421}}^1$

素因数の和:677

約数の個数: 24

約数和(自身を含む): 38709216

約数和(自身を除く): 17068132

約数列:

[1, 2, 4, 71, 142, 181, 284, 362, 421, 724, 842, 1684, 12851, 25702, 29891, 51404, 59782, 76201, 119564, 152402, 304804, 5410271, 10820542, 21641084]

約数ペア:

[(1, 21641084), (2, 10820542), (4, 5410271), (71, 304804), (142, 152402), (181, 119564), (284, 76201), (362, 59782), (421, 51404), (724, 29891), (842, 25702), (1684, 12851)]