12806980

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{311}}^1$

素因数の和:420

約数の個数: 48

約数和(自身を含む): 28304640

約数和(自身を除く): 15497660

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 71, 116, 142, 145, 284, 290, 311, 355, 580, 622, 710, 1244, 1420, 1555, 2059, 3110, 4118, 6220, 8236, 9019, 10295, 18038, 20590, 22081, 36076, 41180, 44162, 45095, 88324, 90190, 110405, 180380, 220810, 441620, 640349, 1280698, 2561396, 3201745, 6403490, 12806980]

約数ペア:

[(1, 12806980), (2, 6403490), (4, 3201745), (5, 2561396), (10, 1280698), (20, 640349), (29, 441620), (58, 220810), (71, 180380), (116, 110405), (142, 90190), (145, 88324), (284, 45095), (290, 44162), (311, 41180), (355, 36076), (580, 22081), (622, 20590), (710, 18038), (1244, 10295), (1420, 9019), (1555, 8236), (2059, 6220), (3110, 4118)]