81630520

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{16069}}^1$

素因数の和:16207

約数の個数: 32

約数和(自身を含む): 185126400

約数和(自身を除く): 103495880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 5080, 16069, 32138, 64276, 80345, 128552, 160690, 321380, 642760, 2040763, 4081526, 8163052, 10203815, 16326104, 20407630, 40815260, 81630520]

約数ペア:

[(1, 81630520), (2, 40815260), (4, 20407630), (5, 16326104), (8, 10203815), (10, 8163052), (20, 4081526), (40, 2040763), (127, 642760), (254, 321380), (508, 160690), (635, 128552), (1016, 80345), (1270, 64276), (2540, 32138), (5080, 16069)]