20438870

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{1109}}^1$

素因数の和:1232

約数の個数: 32

約数和(自身を含む): 39160800

約数和(自身を除く): 18721930

約数列:

[1, 2, 5, 10, 19, 38, 95, 97, 190, 194, 485, 970, 1109, 1843, 2218, 3686, 5545, 9215, 11090, 18430, 21071, 42142, 105355, 107573, 210710, 215146, 537865, 1075730, 2043887, 4087774, 10219435, 20438870]

約数ペア:

[(1, 20438870), (2, 10219435), (5, 4087774), (10, 2043887), (19, 1075730), (38, 537865), (95, 215146), (97, 210710), (190, 107573), (194, 105355), (485, 42142), (970, 21071), (1109, 18430), (1843, 11090), (2218, 9215), (3686, 5545)]