21639765

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{10847}}^1$

素因数の和:10881

約数の個数: 32

約数和(自身を含む): 41656320

約数和(自身を除く): 20016555

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995, 10847, 32541, 54235, 75929, 162705, 206093, 227787, 379645, 618279, 1030465, 1138935, 1442651, 3091395, 4327953, 7213255, 21639765]

約数ペア:

[(1, 21639765), (3, 7213255), (5, 4327953), (7, 3091395), (15, 1442651), (19, 1138935), (21, 1030465), (35, 618279), (57, 379645), (95, 227787), (105, 206093), (133, 162705), (285, 75929), (399, 54235), (665, 32541), (1995, 10847)]