640629921

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{89}}^1\times {\mathrm{2663}}^1$

素因数の和:2825

約数の個数: 32

約数和(自身を含む): 932186880

約数和(自身を除く): 291556959

約数列:

[1, 3, 17, 51, 53, 89, 159, 267, 901, 1513, 2663, 2703, 4539, 4717, 7989, 14151, 45271, 80189, 135813, 141139, 237007, 240567, 423417, 711021, 2399363, 4029119, 7198089, 12087357, 12561371, 37684113, 213543307, 640629921]

約数ペア:

[(1, 640629921), (3, 213543307), (17, 37684113), (51, 12561371), (53, 12087357), (89, 7198089), (159, 4029119), (267, 2399363), (901, 711021), (1513, 423417), (2663, 240567), (2703, 237007), (4539, 141139), (4717, 135813), (7989, 80189), (14151, 45271)]