1280205

素因数分解:

$3^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{109}}^1$

素因数の和:155

約数の個数: 40

約数和(自身を含む): 2395800

約数和(自身を除く): 1115595

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 81, 87, 109, 135, 145, 261, 327, 405, 435, 545, 783, 981, 1305, 1635, 2349, 2943, 3161, 3915, 4905, 8829, 9483, 11745, 14715, 15805, 28449, 44145, 47415, 85347, 142245, 256041, 426735, 1280205]

約数ペア:

[(1, 1280205), (3, 426735), (5, 256041), (9, 142245), (15, 85347), (27, 47415), (29, 44145), (45, 28449), (81, 15805), (87, 14715), (109, 11745), (135, 9483), (145, 8829), (261, 4905), (327, 3915), (405, 3161), (435, 2943), (545, 2349), (783, 1635), (981, 1305)]