21396340

素因数分解:

$2^2\times 5^1\times 7^3\times {\mathrm{3119}}^1$

素因数の和:3149

約数の個数: 48

約数和(自身を含む): 52416000

約数和(自身を除く): 31019660

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 343, 490, 686, 980, 1372, 1715, 3119, 3430, 6238, 6860, 12476, 15595, 21833, 31190, 43666, 62380, 87332, 109165, 152831, 218330, 305662, 436660, 611324, 764155, 1069817, 1528310, 2139634, 3056620, 4279268, 5349085, 10698170, 21396340]

約数ペア:

[(1, 21396340), (2, 10698170), (4, 5349085), (5, 4279268), (7, 3056620), (10, 2139634), (14, 1528310), (20, 1069817), (28, 764155), (35, 611324), (49, 436660), (70, 305662), (98, 218330), (140, 152831), (196, 109165), (245, 87332), (343, 62380), (490, 43666), (686, 31190), (980, 21833), (1372, 15595), (1715, 12476), (3119, 6860), (3430, 6238)]