20518280

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{16547}}^1$

素因数の和:16589

約数の個数: 32

約数和(自身を含む): 47658240

約数和(自身を除く): 27139960

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16547, 33094, 66188, 82735, 132376, 165470, 330940, 512957, 661880, 1025914, 2051828, 2564785, 4103656, 5129570, 10259140, 20518280]

約数ペア:

[(1, 20518280), (2, 10259140), (4, 5129570), (5, 4103656), (8, 2564785), (10, 2051828), (20, 1025914), (31, 661880), (40, 512957), (62, 330940), (124, 165470), (155, 132376), (248, 82735), (310, 66188), (620, 33094), (1240, 16547)]