18204400

素因数分解:

$2^4\times 5^2\times {\mathrm{71}}^1\times {\mathrm{641}}^1$

素因数の和:730

約数の個数: 60

約数和(自身を含む): 44421264

約数和(自身を除く): 26216864

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 71, 80, 100, 142, 200, 284, 355, 400, 568, 641, 710, 1136, 1282, 1420, 1775, 2564, 2840, 3205, 3550, 5128, 5680, 6410, 7100, 10256, 12820, 14200, 16025, 25640, 28400, 32050, 45511, 51280, 64100, 91022, 128200, 182044, 227555, 256400, 364088, 455110, 728176, 910220, 1137775, 1820440, 2275550, 3640880, 4551100, 9102200, 18204400]

約数ペア:

[(1, 18204400), (2, 9102200), (4, 4551100), (5, 3640880), (8, 2275550), (10, 1820440), (16, 1137775), (20, 910220), (25, 728176), (40, 455110), (50, 364088), (71, 256400), (80, 227555), (100, 182044), (142, 128200), (200, 91022), (284, 64100), (355, 51280), (400, 45511), (568, 32050), (641, 28400), (710, 25640), (1136, 16025), (1282, 14200), (1420, 12820), (1775, 10256), (2564, 7100), (2840, 6410), (3205, 5680), (3550, 5128)]