20774156

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{389}}^1$

素因数の和:498

約数の個数: 36

約数和(自身を含む): 39967200

約数和(自身を除く): 19193044

約数列:

[1, 2, 4, 13, 26, 52, 79, 158, 169, 316, 338, 389, 676, 778, 1027, 1556, 2054, 4108, 5057, 10114, 13351, 20228, 26702, 30731, 53404, 61462, 65741, 122924, 131482, 262964, 399503, 799006, 1598012, 5193539, 10387078, 20774156]

約数ペア:

[(1, 20774156), (2, 10387078), (4, 5193539), (13, 1598012), (26, 799006), (52, 399503), (79, 262964), (158, 131482), (169, 122924), (316, 65741), (338, 61462), (389, 53404), (676, 30731), (778, 26702), (1027, 20228), (1556, 13351), (2054, 10114), (4108, 5057)]