21253764

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{421}}^1\times {\mathrm{601}}^1$

素因数の和:1036

約数の個数: 48

約数和(自身を含む): 56905856

約数和(自身を除く): 35652092

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 421, 601, 842, 1202, 1263, 1684, 1803, 2404, 2526, 2947, 3606, 4207, 5052, 5894, 7212, 8414, 8841, 11788, 12621, 16828, 17682, 25242, 35364, 50484, 253021, 506042, 759063, 1012084, 1518126, 1771147, 3036252, 3542294, 5313441, 7084588, 10626882, 21253764]

約数ペア:

[(1, 21253764), (2, 10626882), (3, 7084588), (4, 5313441), (6, 3542294), (7, 3036252), (12, 1771147), (14, 1518126), (21, 1012084), (28, 759063), (42, 506042), (84, 253021), (421, 50484), (601, 35364), (842, 25242), (1202, 17682), (1263, 16828), (1684, 12621), (1803, 11788), (2404, 8841), (2526, 8414), (2947, 7212), (3606, 5894), (4207, 5052)]