20999385

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{179}}^1$

素因数の和:283

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 20472615

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 79, 99, 135, 165, 179, 237, 297, 395, 495, 537, 711, 869, 895, 1185, 1485, 1611, 1969, 2133, 2607, 2685, 3555, 4345, 4833, 5907, 7821, 8055, 9845, 10665, 13035, 14141, 17721, 23463, 24165, 29535, 39105, 42423, 53163, 70705, 88605, 117315, 127269, 155551, 212115, 265815, 381807, 466653, 636345, 777755, 1399959, 1909035, 2333265, 4199877, 6999795, 20999385]

約数ペア:

[(1, 20999385), (3, 6999795), (5, 4199877), (9, 2333265), (11, 1909035), (15, 1399959), (27, 777755), (33, 636345), (45, 466653), (55, 381807), (79, 265815), (99, 212115), (135, 155551), (165, 127269), (179, 117315), (237, 88605), (297, 70705), (395, 53163), (495, 42423), (537, 39105), (711, 29535), (869, 24165), (895, 23463), (1185, 17721), (1485, 14141), (1611, 13035), (1969, 10665), (2133, 9845), (2607, 8055), (2685, 7821), (3555, 5907), (4345, 4833)]