1280451920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181}}^1\times {\mathrm{8039}}^1$

素因数の和:8244

約数の個数: 80

約数和(自身を含む): 3266040960

約数和(自身を除く): 1985589040

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 181, 220, 362, 440, 724, 880, 905, 1448, 1810, 1991, 2896, 3620, 3982, 7240, 7964, 8039, 9955, 14480, 15928, 16078, 19910, 31856, 32156, 39820, 40195, 64312, 79640, 80390, 88429, 128624, 159280, 160780, 176858, 321560, 353716, 442145, 643120, 707432, 884290, 1414864, 1455059, 1768580, 2910118, 3537160, 5820236, 7074320, 7275295, 11640472, 14550590, 16005649, 23280944, 29101180, 32011298, 58202360, 64022596, 80028245, 116404720, 128045192, 160056490, 256090384, 320112980, 640225960, 1280451920]

約数ペア:

[(1, 1280451920), (2, 640225960), (4, 320112980), (5, 256090384), (8, 160056490), (10, 128045192), (11, 116404720), (16, 80028245), (20, 64022596), (22, 58202360), (40, 32011298), (44, 29101180), (55, 23280944), (80, 16005649), (88, 14550590), (110, 11640472), (176, 7275295), (181, 7074320), (220, 5820236), (362, 3537160), (440, 2910118), (724, 1768580), (880, 1455059), (905, 1414864), (1448, 884290), (1810, 707432), (1991, 643120), (2896, 442145), (3620, 353716), (3982, 321560), (7240, 176858), (7964, 160780), (8039, 159280), (9955, 128624), (14480, 88429), (15928, 80390), (16078, 79640), (19910, 64312), (31856, 40195), (32156, 39820)]