19804784

素因数分解:

$2^4\times {\mathrm{31}}^1\times {\mathrm{39929}}^1$

素因数の和:39968

約数の個数: 20

約数和(自身を含む): 39610560

約数和(自身を除く): 19805776

約数列:

[1, 2, 4, 8, 16, 31, 62, 124, 248, 496, 39929, 79858, 159716, 319432, 638864, 1237799, 2475598, 4951196, 9902392, 19804784]

約数ペア:

[(1, 19804784), (2, 9902392), (4, 4951196), (8, 2475598), (16, 1237799), (31, 638864), (62, 319432), (124, 159716), (248, 79858), (496, 39929)]