19813899

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{137}}^1$

素因数の和:315

約数の個数: 32

約数和(自身を含む): 31159296

約数和(自身を除く): 11345397

約数列:

[1, 3, 7, 21, 71, 97, 137, 213, 291, 411, 497, 679, 959, 1491, 2037, 2877, 6887, 9727, 13289, 20661, 29181, 39867, 48209, 68089, 93023, 144627, 204267, 279069, 943519, 2830557, 6604633, 19813899]

約数ペア:

[(1, 19813899), (3, 6604633), (7, 2830557), (21, 943519), (71, 279069), (97, 204267), (137, 144627), (213, 93023), (291, 68089), (411, 48209), (497, 39867), (679, 29181), (959, 20661), (1491, 13289), (2037, 9727), (2877, 6887)]