20709620

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{54499}}^1$

素因数の和:54527

約数の個数: 24

約数和(自身を含む): 45780000

約数和(自身を除く): 25070380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 54499, 108998, 217996, 272495, 544990, 1035481, 1089980, 2070962, 4141924, 5177405, 10354810, 20709620]

約数ペア:

[(1, 20709620), (2, 10354810), (4, 5177405), (5, 4141924), (10, 2070962), (19, 1089980), (20, 1035481), (38, 544990), (76, 272495), (95, 217996), (190, 108998), (380, 54499)]