21025628

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{1637}}^1$

素因数の和:1686

約数の個数: 36

約数和(自身を含む): 41965560

約数和(自身を除く): 20939932

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 169, 247, 338, 494, 676, 988, 1637, 3211, 3274, 6422, 6548, 12844, 21281, 31103, 42562, 62206, 85124, 124412, 276653, 404339, 553306, 808678, 1106612, 1617356, 5256407, 10512814, 21025628]

約数ペア:

[(1, 21025628), (2, 10512814), (4, 5256407), (13, 1617356), (19, 1106612), (26, 808678), (38, 553306), (52, 404339), (76, 276653), (169, 124412), (247, 85124), (338, 62206), (494, 42562), (676, 31103), (988, 21281), (1637, 12844), (3211, 6548), (3274, 6422)]