21131538316

素因数分解:

$2^2\times 7^2\times {\mathrm{109}}^1\times {\mathrm{989119}}^1$

素因数の和:989246

約数の個数: 36

約数和(自身を含む): 43412476800

約数和(自身を除く): 22280938484

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 109, 196, 218, 436, 763, 1526, 3052, 5341, 10682, 21364, 989119, 1978238, 3956476, 6923833, 13847666, 27695332, 48466831, 96933662, 107813971, 193867324, 215627942, 431255884, 754697797, 1509395594, 3018791188, 5282884579, 10565769158, 21131538316]

約数ペア:

[(1, 21131538316), (2, 10565769158), (4, 5282884579), (7, 3018791188), (14, 1509395594), (28, 754697797), (49, 431255884), (98, 215627942), (109, 193867324), (196, 107813971), (218, 96933662), (436, 48466831), (763, 27695332), (1526, 13847666), (3052, 6923833), (5341, 3956476), (10682, 1978238), (21364, 989119)]