21645880

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4261}}^1$

素因数の和:4399

約数の個数: 32

約数和(自身を含む): 49098240

約数和(自身を除く): 27452360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4261, 5080, 8522, 17044, 21305, 34088, 42610, 85220, 170440, 541147, 1082294, 2164588, 2705735, 4329176, 5411470, 10822940, 21645880]

約数ペア:

[(1, 21645880), (2, 10822940), (4, 5411470), (5, 4329176), (8, 2705735), (10, 2164588), (20, 1082294), (40, 541147), (127, 170440), (254, 85220), (508, 42610), (635, 34088), (1016, 21305), (1270, 17044), (2540, 8522), (4261, 5080)]