20987484

素因数分解:

$2^2\times 3^1\times 7^3\times {\mathrm{5099}}^1$

素因数の和:5127

約数の個数: 48

約数和(自身を含む): 57120000

約数和(自身を除く): 36132516

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 98, 147, 196, 294, 343, 588, 686, 1029, 1372, 2058, 4116, 5099, 10198, 15297, 20396, 30594, 35693, 61188, 71386, 107079, 142772, 214158, 249851, 428316, 499702, 749553, 999404, 1499106, 1748957, 2998212, 3497914, 5246871, 6995828, 10493742, 20987484]

約数ペア:

[(1, 20987484), (2, 10493742), (3, 6995828), (4, 5246871), (6, 3497914), (7, 2998212), (12, 1748957), (14, 1499106), (21, 999404), (28, 749553), (42, 499702), (49, 428316), (84, 249851), (98, 214158), (147, 142772), (196, 107079), (294, 71386), (343, 61188), (588, 35693), (686, 30594), (1029, 20396), (1372, 15297), (2058, 10198), (4116, 5099)]