18996831

素因数分解:

$3^2\times 7^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 33067008

約数和(自身を除く): 14070177

約数列:

[1, 3, 7, 9, 21, 31, 63, 71, 93, 137, 213, 217, 279, 411, 497, 639, 651, 959, 1233, 1491, 1953, 2201, 2877, 4247, 4473, 6603, 8631, 9727, 12741, 15407, 19809, 29181, 29729, 38223, 46221, 68089, 87543, 89187, 138663, 204267, 267561, 301537, 612801, 904611, 2110759, 2713833, 6332277, 18996831]

約数ペア:

[(1, 18996831), (3, 6332277), (7, 2713833), (9, 2110759), (21, 904611), (31, 612801), (63, 301537), (71, 267561), (93, 204267), (137, 138663), (213, 89187), (217, 87543), (279, 68089), (411, 46221), (497, 38223), (639, 29729), (651, 29181), (959, 19809), (1233, 15407), (1491, 12741), (1953, 9727), (2201, 8631), (2877, 6603), (4247, 4473)]