21872515

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{1061}}^1$

素因数の和:1123

約数の個数: 32

約数和(自身を含む): 32624640

約数和(自身を除く): 10752125

約数列:

[1, 5, 7, 19, 31, 35, 95, 133, 155, 217, 589, 665, 1061, 1085, 2945, 4123, 5305, 7427, 20159, 20615, 32891, 37135, 100795, 141113, 164455, 230237, 624929, 705565, 1151185, 3124645, 4374503, 21872515]

約数ペア:

[(1, 21872515), (5, 4374503), (7, 3124645), (19, 1151185), (31, 705565), (35, 624929), (95, 230237), (133, 164455), (155, 141113), (217, 100795), (589, 37135), (665, 32891), (1061, 20615), (1085, 20159), (2945, 7427), (4123, 5305)]