51221560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{719}}^1$

素因数の和:880

約数の個数: 64

約数和(自身を含む): 125193600

約数和(自身を除く): 73972040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 137, 260, 274, 520, 548, 685, 719, 1096, 1370, 1438, 1781, 2740, 2876, 3562, 3595, 5480, 5752, 7124, 7190, 8905, 9347, 14248, 14380, 17810, 18694, 28760, 35620, 37388, 46735, 71240, 74776, 93470, 98503, 186940, 197006, 373880, 394012, 492515, 788024, 985030, 1280539, 1970060, 2561078, 3940120, 5122156, 6402695, 10244312, 12805390, 25610780, 51221560]

約数ペア:

[(1, 51221560), (2, 25610780), (4, 12805390), (5, 10244312), (8, 6402695), (10, 5122156), (13, 3940120), (20, 2561078), (26, 1970060), (40, 1280539), (52, 985030), (65, 788024), (104, 492515), (130, 394012), (137, 373880), (260, 197006), (274, 186940), (520, 98503), (548, 93470), (685, 74776), (719, 71240), (1096, 46735), (1370, 37388), (1438, 35620), (1781, 28760), (2740, 18694), (2876, 17810), (3562, 14380), (3595, 14248), (5480, 9347), (5752, 8905), (7124, 7190)]