19747984

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{521}}^1$

素因数の和:655

約数の個数: 40

約数和(自身を含む): 40390272

約数和(自身を除く): 20642288

約数列:

[1, 2, 4, 8, 16, 23, 46, 92, 103, 184, 206, 368, 412, 521, 824, 1042, 1648, 2084, 2369, 4168, 4738, 8336, 9476, 11983, 18952, 23966, 37904, 47932, 53663, 95864, 107326, 191728, 214652, 429304, 858608, 1234249, 2468498, 4936996, 9873992, 19747984]

約数ペア:

[(1, 19747984), (2, 9873992), (4, 4936996), (8, 2468498), (16, 1234249), (23, 858608), (46, 429304), (92, 214652), (103, 191728), (184, 107326), (206, 95864), (368, 53663), (412, 47932), (521, 37904), (824, 23966), (1042, 18952), (1648, 11983), (2084, 9476), (2369, 8336), (4168, 4738)]