28120840

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{809}}^1$

素因数の和:910

約数の個数: 64

約数和(自身を含む): 69984000

約数和(自身を除く): 41863160

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 79, 88, 110, 158, 220, 316, 395, 440, 632, 790, 809, 869, 1580, 1618, 1738, 3160, 3236, 3476, 4045, 4345, 6472, 6952, 8090, 8690, 8899, 16180, 17380, 17798, 32360, 34760, 35596, 44495, 63911, 71192, 88990, 127822, 177980, 255644, 319555, 355960, 511288, 639110, 703021, 1278220, 1406042, 2556440, 2812084, 3515105, 5624168, 7030210, 14060420, 28120840]

約数ペア:

[(1, 28120840), (2, 14060420), (4, 7030210), (5, 5624168), (8, 3515105), (10, 2812084), (11, 2556440), (20, 1406042), (22, 1278220), (40, 703021), (44, 639110), (55, 511288), (79, 355960), (88, 319555), (110, 255644), (158, 177980), (220, 127822), (316, 88990), (395, 71192), (440, 63911), (632, 44495), (790, 35596), (809, 34760), (869, 32360), (1580, 17798), (1618, 17380), (1738, 16180), (3160, 8899), (3236, 8690), (3476, 8090), (4045, 6952), (4345, 6472)]