21597784

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{207671}}^1$

素因数の和:207690

約数の個数: 16

約数和(自身を含む): 43611120

約数和(自身を除く): 22013336

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 207671, 415342, 830684, 1661368, 2699723, 5399446, 10798892, 21597784]

約数ペア:

[(1, 21597784), (2, 10798892), (4, 5399446), (8, 2699723), (13, 1661368), (26, 830684), (52, 415342), (104, 207671)]