81899139

素因数分解:

$3^1\times 7^3\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:173

約数の個数: 64

約数和(自身を含む): 138240000

約数和(自身を除く): 56340861

約数列:

[1, 3, 7, 19, 21, 49, 57, 59, 71, 133, 147, 177, 213, 343, 399, 413, 497, 931, 1029, 1121, 1239, 1349, 1491, 2793, 2891, 3363, 3479, 4047, 4189, 6517, 7847, 8673, 9443, 10437, 12567, 19551, 20237, 23541, 24353, 28329, 29323, 54929, 60711, 66101, 73059, 79591, 87969, 164787, 198303, 205261, 238773, 384503, 462707, 557137, 615783, 1153509, 1388121, 1436827, 1671411, 3899959, 4310481, 11699877, 27299713, 81899139]

約数ペア:

[(1, 81899139), (3, 27299713), (7, 11699877), (19, 4310481), (21, 3899959), (49, 1671411), (57, 1436827), (59, 1388121), (71, 1153509), (133, 615783), (147, 557137), (177, 462707), (213, 384503), (343, 238773), (399, 205261), (413, 198303), (497, 164787), (931, 87969), (1029, 79591), (1121, 73059), (1239, 66101), (1349, 60711), (1491, 54929), (2793, 29323), (2891, 28329), (3363, 24353), (3479, 23541), (4047, 20237), (4189, 19551), (6517, 12567), (7847, 10437), (8673, 9443)]