20399876

素因数分解:

$2^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{97}}^1$

素因数の和:181

約数の個数: 72

約数和(自身を含む): 44576280

約数和(自身を除く): 24176404

約数列:

[1, 2, 4, 7, 14, 28, 29, 37, 49, 58, 74, 97, 98, 116, 148, 194, 196, 203, 259, 388, 406, 518, 679, 812, 1036, 1073, 1358, 1421, 1813, 2146, 2716, 2813, 2842, 3589, 3626, 4292, 4753, 5626, 5684, 7178, 7252, 7511, 9506, 11252, 14356, 15022, 19012, 19691, 25123, 30044, 39382, 50246, 52577, 78764, 100492, 104081, 105154, 137837, 175861, 208162, 210308, 275674, 351722, 416324, 551348, 703444, 728567, 1457134, 2914268, 5099969, 10199938, 20399876]

約数ペア:

[(1, 20399876), (2, 10199938), (4, 5099969), (7, 2914268), (14, 1457134), (28, 728567), (29, 703444), (37, 551348), (49, 416324), (58, 351722), (74, 275674), (97, 210308), (98, 208162), (116, 175861), (148, 137837), (194, 105154), (196, 104081), (203, 100492), (259, 78764), (388, 52577), (406, 50246), (518, 39382), (679, 30044), (812, 25123), (1036, 19691), (1073, 19012), (1358, 15022), (1421, 14356), (1813, 11252), (2146, 9506), (2716, 7511), (2813, 7252), (2842, 7178), (3589, 5684), (3626, 5626), (4292, 4753)]