21042138

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{2671}}^1$

素因数の和:2790

約数の個数: 32

約数和(自身を含む): 45787392

約数和(自身を除く): 24745254

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 101, 202, 303, 606, 1313, 2626, 2671, 3939, 5342, 7878, 8013, 16026, 34723, 69446, 104169, 208338, 269771, 539542, 809313, 1618626, 3507023, 7014046, 10521069, 21042138]

約数ペア:

[(1, 21042138), (2, 10521069), (3, 7014046), (6, 3507023), (13, 1618626), (26, 809313), (39, 539542), (78, 269771), (101, 208338), (202, 104169), (303, 69446), (606, 34723), (1313, 16026), (2626, 8013), (2671, 7878), (3939, 5342)]