81261100

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^2\times {\mathrm{2251}}^1$

素因数の和:2303

約数の個数: 54

約数和(自身を含む): 186188604

約数和(自身を除く): 104927504

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 76, 95, 100, 190, 361, 380, 475, 722, 950, 1444, 1805, 1900, 2251, 3610, 4502, 7220, 9004, 9025, 11255, 18050, 22510, 36100, 42769, 45020, 56275, 85538, 112550, 171076, 213845, 225100, 427690, 812611, 855380, 1069225, 1625222, 2138450, 3250444, 4063055, 4276900, 8126110, 16252220, 20315275, 40630550, 81261100]

約数ペア:

[(1, 81261100), (2, 40630550), (4, 20315275), (5, 16252220), (10, 8126110), (19, 4276900), (20, 4063055), (25, 3250444), (38, 2138450), (50, 1625222), (76, 1069225), (95, 855380), (100, 812611), (190, 427690), (361, 225100), (380, 213845), (475, 171076), (722, 112550), (950, 85538), (1444, 56275), (1805, 45020), (1900, 42769), (2251, 36100), (3610, 22510), (4502, 18050), (7220, 11255), (9004, 9025)]