21197072

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{1009}}^1$

素因数の和:1131

約数の個数: 40

約数和(自身を含む): 44710680

約数和(自身を除く): 23513608

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 101, 104, 202, 208, 404, 808, 1009, 1313, 1616, 2018, 2626, 4036, 5252, 8072, 10504, 13117, 16144, 21008, 26234, 52468, 101909, 104936, 203818, 209872, 407636, 815272, 1324817, 1630544, 2649634, 5299268, 10598536, 21197072]

約数ペア:

[(1, 21197072), (2, 10598536), (4, 5299268), (8, 2649634), (13, 1630544), (16, 1324817), (26, 815272), (52, 407636), (101, 209872), (104, 203818), (202, 104936), (208, 101909), (404, 52468), (808, 26234), (1009, 21008), (1313, 16144), (1616, 13117), (2018, 10504), (2626, 8072), (4036, 5252)]