21597205

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{691}}^1$

素因数の和:769

約数の個数: 32

約数和(自身を含む): 31887360

約数和(自身を除く): 10290155

約数列:

[1, 5, 7, 19, 35, 47, 95, 133, 235, 329, 665, 691, 893, 1645, 3455, 4465, 4837, 6251, 13129, 24185, 31255, 32477, 65645, 91903, 162385, 227339, 459515, 617063, 1136695, 3085315, 4319441, 21597205]

約数ペア:

[(1, 21597205), (5, 4319441), (7, 3085315), (19, 1136695), (35, 617063), (47, 459515), (95, 227339), (133, 162385), (235, 91903), (329, 65645), (665, 32477), (691, 31255), (893, 24185), (1645, 13129), (3455, 6251), (4465, 4837)]