207819945

素因数分解:

$3^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1\times {\mathrm{487}}^1$

素因数の和:639

約数の個数: 64

約数和(自身を含む): 386496000

約数和(自身を除く): 178676055

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 87, 109, 135, 145, 261, 327, 435, 487, 545, 783, 981, 1305, 1461, 1635, 2435, 2943, 3161, 3915, 4383, 4905, 7305, 9483, 13149, 14123, 14715, 15805, 21915, 28449, 42369, 47415, 53083, 65745, 70615, 85347, 127107, 142245, 159249, 211845, 265415, 381321, 426735, 477747, 635535, 796245, 1433241, 1539407, 1906605, 2388735, 4618221, 7166205, 7697035, 13854663, 23091105, 41563989, 69273315, 207819945]

約数ペア:

[(1, 207819945), (3, 69273315), (5, 41563989), (9, 23091105), (15, 13854663), (27, 7697035), (29, 7166205), (45, 4618221), (87, 2388735), (109, 1906605), (135, 1539407), (145, 1433241), (261, 796245), (327, 635535), (435, 477747), (487, 426735), (545, 381321), (783, 265415), (981, 211845), (1305, 159249), (1461, 142245), (1635, 127107), (2435, 85347), (2943, 70615), (3161, 65745), (3915, 53083), (4383, 47415), (4905, 42369), (7305, 28449), (9483, 21915), (13149, 15805), (14123, 14715)]