20154681

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1$

素因数の和:166

約数の個数: 48

約数和(自身を含む): 32348160

約数和(自身を除く): 12193479

約数列:

[1, 3, 9, 29, 31, 47, 53, 87, 93, 141, 159, 261, 279, 423, 477, 899, 1363, 1457, 1537, 1643, 2491, 2697, 4089, 4371, 4611, 4929, 7473, 8091, 12267, 13113, 13833, 14787, 22419, 42253, 47647, 72239, 77221, 126759, 142941, 216717, 231663, 380277, 428823, 650151, 694989, 2239409, 6718227, 20154681]

約数ペア:

[(1, 20154681), (3, 6718227), (9, 2239409), (29, 694989), (31, 650151), (47, 428823), (53, 380277), (87, 231663), (93, 216717), (141, 142941), (159, 126759), (261, 77221), (279, 72239), (423, 47647), (477, 42253), (899, 22419), (1363, 14787), (1457, 13833), (1537, 13113), (1643, 12267), (2491, 8091), (2697, 7473), (4089, 4929), (4371, 4611)]