261348880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{251297}}^1$

素因数の和:251323

約数の個数: 40

約数和(自身を含む): 654379992

約数和(自身を除く): 393031112

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 251297, 502594, 1005188, 1256485, 2010376, 2512970, 3266861, 4020752, 5025940, 6533722, 10051880, 13067444, 16334305, 20103760, 26134888, 32668610, 52269776, 65337220, 130674440, 261348880]

約数ペア:

[(1, 261348880), (2, 130674440), (4, 65337220), (5, 52269776), (8, 32668610), (10, 26134888), (13, 20103760), (16, 16334305), (20, 13067444), (26, 10051880), (40, 6533722), (52, 5025940), (65, 4020752), (80, 3266861), (104, 2512970), (130, 2010376), (208, 1256485), (260, 1005188), (520, 502594), (1040, 251297)]