20678775

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{167}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 37330944

約数和(自身を除く): 16652169

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 127, 167, 195, 325, 381, 501, 635, 835, 975, 1651, 1905, 2171, 2505, 3175, 4175, 4953, 6513, 8255, 9525, 10855, 12525, 21209, 24765, 32565, 41275, 54275, 63627, 106045, 123825, 162825, 275717, 318135, 530225, 827151, 1378585, 1590675, 4135755, 6892925, 20678775]

約数ペア:

[(1, 20678775), (3, 6892925), (5, 4135755), (13, 1590675), (15, 1378585), (25, 827151), (39, 530225), (65, 318135), (75, 275717), (127, 162825), (167, 123825), (195, 106045), (325, 63627), (381, 54275), (501, 41275), (635, 32565), (835, 24765), (975, 21209), (1651, 12525), (1905, 10855), (2171, 9525), (2505, 8255), (3175, 6513), (4175, 4953)]