21015645

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2819}}^1$

素因数の和:2905

約数の個数: 32

約数和(自身を含む): 38983680

約数和(自身を除く): 17968035

約数列:

[1, 3, 5, 7, 15, 21, 35, 71, 105, 213, 355, 497, 1065, 1491, 2485, 2819, 7455, 8457, 14095, 19733, 42285, 59199, 98665, 200149, 295995, 600447, 1000745, 1401043, 3002235, 4203129, 7005215, 21015645]

約数ペア:

[(1, 21015645), (3, 7005215), (5, 4203129), (7, 3002235), (15, 1401043), (21, 1000745), (35, 600447), (71, 295995), (105, 200149), (213, 98665), (355, 59199), (497, 42285), (1065, 19733), (1491, 14095), (2485, 8457), (2819, 7455)]