19801616

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{17431}}^1$

素因数の和:17510

約数の個数: 20

約数和(自身を含む): 38908224

約数和(自身を除く): 19106608

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 1136, 17431, 34862, 69724, 139448, 278896, 1237601, 2475202, 4950404, 9900808, 19801616]

約数ペア:

[(1, 19801616), (2, 9900808), (4, 4950404), (8, 2475202), (16, 1237601), (71, 278896), (142, 139448), (284, 69724), (568, 34862), (1136, 17431)]