20959504

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{251}}^1\times {\mathrm{307}}^1$

素因数の和:583

約数の個数: 40

約数和(自身を含む): 43309728

約数和(自身を除く): 22350224

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 251, 272, 307, 502, 614, 1004, 1228, 2008, 2456, 4016, 4267, 4912, 5219, 8534, 10438, 17068, 20876, 34136, 41752, 68272, 77057, 83504, 154114, 308228, 616456, 1232912, 1309969, 2619938, 5239876, 10479752, 20959504]

約数ペア:

[(1, 20959504), (2, 10479752), (4, 5239876), (8, 2619938), (16, 1309969), (17, 1232912), (34, 616456), (68, 308228), (136, 154114), (251, 83504), (272, 77057), (307, 68272), (502, 41752), (614, 34136), (1004, 20876), (1228, 17068), (2008, 10438), (2456, 8534), (4016, 5219), (4267, 4912)]