20688616

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{198929}}^1$

素因数の和:198948

約数の個数: 16

約数和(自身を含む): 41775300

約数和(自身を除く): 21086684

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 198929, 397858, 795716, 1591432, 2586077, 5172154, 10344308, 20688616]

約数ペア:

[(1, 20688616), (2, 10344308), (4, 5172154), (8, 2586077), (13, 1591432), (26, 795716), (52, 397858), (104, 198929)]