20508560

素因数分解:

$2^4\times 5^1\times {\mathrm{269}}^1\times {\mathrm{953}}^1$

素因数の和:1235

約数の個数: 40

約数和(自身を含む): 47909880

約数和(自身を除く): 27401320

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 269, 538, 953, 1076, 1345, 1906, 2152, 2690, 3812, 4304, 4765, 5380, 7624, 9530, 10760, 15248, 19060, 21520, 38120, 76240, 256357, 512714, 1025428, 1281785, 2050856, 2563570, 4101712, 5127140, 10254280, 20508560]

約数ペア:

[(1, 20508560), (2, 10254280), (4, 5127140), (5, 4101712), (8, 2563570), (10, 2050856), (16, 1281785), (20, 1025428), (40, 512714), (80, 256357), (269, 76240), (538, 38120), (953, 21520), (1076, 19060), (1345, 15248), (1906, 10760), (2152, 9530), (2690, 7624), (3812, 5380), (4304, 4765)]