204880

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1$

素因数の和:223

約数の個数: 40

約数和(自身を含む): 515592

約数和(自身を除く): 310712

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 197, 208, 260, 394, 520, 788, 985, 1040, 1576, 1970, 2561, 3152, 3940, 5122, 7880, 10244, 12805, 15760, 20488, 25610, 40976, 51220, 102440, 204880]

約数ペア:

[(1, 204880), (2, 102440), (4, 51220), (5, 40976), (8, 25610), (10, 20488), (13, 15760), (16, 12805), (20, 10244), (26, 7880), (40, 5122), (52, 3940), (65, 3152), (80, 2561), (104, 1970), (130, 1576), (197, 1040), (208, 985), (260, 788), (394, 520)]