18719408

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{443}}^1$

素因数の和:609

約数の個数: 40

約数和(自身を含む): 38539200

約数和(自身を除く): 19819792

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 139, 152, 278, 304, 443, 556, 886, 1112, 1772, 2224, 2641, 3544, 5282, 7088, 8417, 10564, 16834, 21128, 33668, 42256, 61577, 67336, 123154, 134672, 246308, 492616, 985232, 1169963, 2339926, 4679852, 9359704, 18719408]

約数ペア:

[(1, 18719408), (2, 9359704), (4, 4679852), (8, 2339926), (16, 1169963), (19, 985232), (38, 492616), (76, 246308), (139, 134672), (152, 123154), (278, 67336), (304, 61577), (443, 42256), (556, 33668), (886, 21128), (1112, 16834), (1772, 10564), (2224, 8417), (2641, 7088), (3544, 5282)]